Home / 21,260.10-31,926.60-13,897.20

Finding the Fourth Proportional to 21,260.10, 31,926.60 and 13,897.20

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Solution

The fourth proportional to 21,260.10, 31,926.60 and 13,897.20 is: 20,869.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,260.10 : 31,926.60 = 13,897.20 : x
  2. Step 2: Convert to fraction form
    21,260.10/31,926.60 = 13,897.20/x
  3. Step 3: Cross multiply
    21,260.10x = 31,926.60 × 13,897.20
  4. Step 4: Simplify right side
    21,260.10x = 443,690,345.52
  5. Step 5: Solve for x
    x = 443,690,345.52/21,260.10
  6. Step 6: Final answer
    x = 20,869.63

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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.