Home / 13,712.90-18,897.87-9,929.66

Finding the Fourth Proportional to 13,712.90, 18,897.87 and 9,929.66

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Solution

The fourth proportional to 13,712.90, 18,897.87 and 9,929.66 is: 13,684.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,712.90 : 18,897.87 = 9,929.66 : x
  2. Step 2: Convert to fraction form
    13,712.90/18,897.87 = 9,929.66/x
  3. Step 3: Cross multiply
    13,712.90x = 18,897.87 × 9,929.66
  4. Step 4: Simplify right side
    13,712.90x = 187,649,423.82
  5. Step 5: Solve for x
    x = 187,649,423.82/13,712.90
  6. Step 6: Final answer
    x = 13,684.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.