Home / 21,263.60-31,929.40-16,917.20

Finding the Fourth Proportional to 21,263.60, 31,929.40 and 16,917.20

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Solution

The fourth proportional to 21,263.60, 31,929.40 and 16,917.20 is: 25,402.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,263.60 : 31,929.40 = 16,917.20 : x
  2. Step 2: Convert to fraction form
    21,263.60/31,929.40 = 16,917.20/x
  3. Step 3: Cross multiply
    21,263.60x = 31,929.40 × 16,917.20
  4. Step 4: Simplify right side
    21,263.60x = 540,156,045.68
  5. Step 5: Solve for x
    x = 540,156,045.68/21,263.60
  6. Step 6: Final answer
    x = 25,402.85

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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.