Home / 18,720,029.20-28,080,043.80-15,696,720.40

Finding the Fourth Proportional to 18,720,029.20, 28,080,043.80 and 15,696,720.40

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Solution

The fourth proportional to 18,720,029.20, 28,080,043.80 and 15,696,720.40 is: 23,545,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720,029.20 : 28,080,043.80 = 15,696,720.40 : x
  2. Step 2: Convert to fraction form
    18,720,029.20/28,080,043.80 = 15,696,720.40/x
  3. Step 3: Cross multiply
    18,720,029.20x = 28,080,043.80 × 15,696,720.40
  4. Step 4: Simplify right side
    18,720,029.20x = 440,764,596,348,353.56
  5. Step 5: Solve for x
    x = 440,764,596,348,353.56/18,720,029.20
  6. Step 6: Final answer
    x = 23,545,080.60

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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.