Home / 20,358,754,979.40-30,538,132,469.10-18,889,426,902.60

Finding the Fourth Proportional to 20,358,754,979.40, 30,538,132,469.10 and 18,889,426,902.60

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Solution

The fourth proportional to 20,358,754,979.40, 30,538,132,469.10 and 18,889,426,902.60 is: 28,334,140,353.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358,754,979.40 : 30,538,132,469.10 = 18,889,426,902.60 : x
  2. Step 2: Convert to fraction form
    20,358,754,979.40/30,538,132,469.10 = 18,889,426,902.60/x
  3. Step 3: Cross multiply
    20,358,754,979.40x = 30,538,132,469.10 × 18,889,426,902.60
  4. Step 4: Simplify right side
    20,358,754,979.40x = 576,847,821,016,979,996,672
  5. Step 5: Solve for x
    x = 576,847,821,016,979,996,672/20,358,754,979.40
  6. Step 6: Final answer
    x = 28,334,140,353.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.