Home / 21,652.90-29,870-13,152.76

Finding the Fourth Proportional to 21,652.90, 29,870 and 13,152.76

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Solution

The fourth proportional to 21,652.90, 29,870 and 13,152.76 is: 18,144.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,652.90 : 29,870 = 13,152.76 : x
  2. Step 2: Convert to fraction form
    21,652.90/29,870 = 13,152.76/x
  3. Step 3: Cross multiply
    21,652.90x = 29,870 × 13,152.76
  4. Step 4: Simplify right side
    21,652.90x = 392,872,941.20
  5. Step 5: Solve for x
    x = 392,872,941.20/21,652.90
  6. Step 6: Final answer
    x = 18,144.13

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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.