Home / 21,342.28-29,449.50-12,389.68

Finding the Fourth Proportional to 21,342.28, 29,449.50 and 12,389.68

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Solution

The fourth proportional to 21,342.28, 29,449.50 and 12,389.68 is: 17,096.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.28 : 29,449.50 = 12,389.68 : x
  2. Step 2: Convert to fraction form
    21,342.28/29,449.50 = 12,389.68/x
  3. Step 3: Cross multiply
    21,342.28x = 29,449.50 × 12,389.68
  4. Step 4: Simplify right side
    21,342.28x = 364,869,881.16
  5. Step 5: Solve for x
    x = 364,869,881.16/21,342.28
  6. Step 6: Final answer
    x = 17,096.11

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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.