Home / 20,712,138.60-31,068,207.90-18,696,599.40

Finding the Fourth Proportional to 20,712,138.60, 31,068,207.90 and 18,696,599.40

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Solution

The fourth proportional to 20,712,138.60, 31,068,207.90 and 18,696,599.40 is: 28,044,899.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712,138.60 : 31,068,207.90 = 18,696,599.40 : x
  2. Step 2: Convert to fraction form
    20,712,138.60/31,068,207.90 = 18,696,599.40/x
  3. Step 3: Cross multiply
    20,712,138.60x = 31,068,207.90 × 18,696,599.40
  4. Step 4: Simplify right side
    20,712,138.60x = 580,869,837,182,215.12
  5. Step 5: Solve for x
    x = 580,869,837,182,215.12/20,712,138.60
  6. Step 6: Final answer
    x = 28,044,899.10

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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.