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Finding the Fourth Proportional to 18,706,498.80, 28,053,916.20 and 7,350,428.40

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Solution

The fourth proportional to 18,706,498.80, 28,053,916.20 and 7,350,428.40 is: 11,023,351.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706,498.80 : 28,053,916.20 = 7,350,428.40 : x
  2. Step 2: Convert to fraction form
    18,706,498.80/28,053,916.20 = 7,350,428.40/x
  3. Step 3: Cross multiply
    18,706,498.80x = 28,053,916.20 × 7,350,428.40
  4. Step 4: Simplify right side
    18,706,498.80x = 206,208,302,367,700.09
  5. Step 5: Solve for x
    x = 206,208,302,367,700.09/18,706,498.80
  6. Step 6: Final answer
    x = 11,023,351.01

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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.