Home / 21,407.51-29,522.85-18,381.68

Finding the Fourth Proportional to 21,407.51, 29,522.85 and 18,381.68

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Solution

The fourth proportional to 21,407.51, 29,522.85 and 18,381.68 is: 25,349.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,407.51 : 29,522.85 = 18,381.68 : x
  2. Step 2: Convert to fraction form
    21,407.51/29,522.85 = 18,381.68/x
  3. Step 3: Cross multiply
    21,407.51x = 29,522.85 × 18,381.68
  4. Step 4: Simplify right side
    21,407.51x = 542,679,563.29
  5. Step 5: Solve for x
    x = 542,679,563.29/21,407.51
  6. Step 6: Final answer
    x = 25,349.96

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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.