Home / 21,257.38-31,870.20-14,664.76

Finding the Fourth Proportional to 21,257.38, 31,870.20 and 14,664.76

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Solution

The fourth proportional to 21,257.38, 31,870.20 and 14,664.76 is: 21,986.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,257.38 : 31,870.20 = 14,664.76 : x
  2. Step 2: Convert to fraction form
    21,257.38/31,870.20 = 14,664.76/x
  3. Step 3: Cross multiply
    21,257.38x = 31,870.20 × 14,664.76
  4. Step 4: Simplify right side
    21,257.38x = 467,368,834.15
  5. Step 5: Solve for x
    x = 467,368,834.15/21,257.38
  6. Step 6: Final answer
    x = 21,986.19

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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.