Home / 20,156.40-30,210.30-10,290.60

Finding the Fourth Proportional to 20,156.40, 30,210.30 and 10,290.60

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Solution

The fourth proportional to 20,156.40, 30,210.30 and 10,290.60 is: 15,423.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.40 : 30,210.30 = 10,290.60 : x
  2. Step 2: Convert to fraction form
    20,156.40/30,210.30 = 10,290.60/x
  3. Step 3: Cross multiply
    20,156.40x = 30,210.30 × 10,290.60
  4. Step 4: Simplify right side
    20,156.40x = 310,882,113.18
  5. Step 5: Solve for x
    x = 310,882,113.18/20,156.40
  6. Step 6: Final answer
    x = 15,423.49

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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.