Home / 21,440.40-29,588.08-12,487.68

Finding the Fourth Proportional to 21,440.40, 29,588.08 and 12,487.68

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Solution

The fourth proportional to 21,440.40, 29,588.08 and 12,487.68 is: 17,233.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,440.40 : 29,588.08 = 12,487.68 : x
  2. Step 2: Convert to fraction form
    21,440.40/29,588.08 = 12,487.68/x
  3. Step 3: Cross multiply
    21,440.40x = 29,588.08 × 12,487.68
  4. Step 4: Simplify right side
    21,440.40x = 369,486,474.85
  5. Step 5: Solve for x
    x = 369,486,474.85/21,440.40
  6. Step 6: Final answer
    x = 17,233.19

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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.