Home / 21,510.96-29,677.74-13,439.14

Finding the Fourth Proportional to 21,510.96, 29,677.74 and 13,439.14

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Solution

The fourth proportional to 21,510.96, 29,677.74 and 13,439.14 is: 18,541.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,510.96 : 29,677.74 = 13,439.14 : x
  2. Step 2: Convert to fraction form
    21,510.96/29,677.74 = 13,439.14/x
  3. Step 3: Cross multiply
    21,510.96x = 29,677.74 × 13,439.14
  4. Step 4: Simplify right side
    21,510.96x = 398,843,302.74
  5. Step 5: Solve for x
    x = 398,843,302.74/21,510.96
  6. Step 6: Final answer
    x = 18,541.40

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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.