Home / 21,312,109.20-31,931,422.20-9,929,211.60

Finding the Fourth Proportional to 21,312,109.20, 31,931,422.20 and 9,929,211.60

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Solution

The fourth proportional to 21,312,109.20, 31,931,422.20 and 9,929,211.60 is: 14,876,699.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312,109.20 : 31,931,422.20 = 9,929,211.60 : x
  2. Step 2: Convert to fraction form
    21,312,109.20/31,931,422.20 = 9,929,211.60/x
  3. Step 3: Cross multiply
    21,312,109.20x = 31,931,422.20 × 9,929,211.60
  4. Step 4: Simplify right side
    21,312,109.20x = 317,053,847,712,737.50
  5. Step 5: Solve for x
    x = 317,053,847,712,737.50/21,312,109.20
  6. Step 6: Final answer
    x = 14,876,699.66

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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.