Home / 21,439.79-29,586.87-13,056.29

Finding the Fourth Proportional to 21,439.79, 29,586.87 and 13,056.29

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Solution

The fourth proportional to 21,439.79, 29,586.87 and 13,056.29 is: 18,017.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439.79 : 29,586.87 = 13,056.29 : x
  2. Step 2: Convert to fraction form
    21,439.79/29,586.87 = 13,056.29/x
  3. Step 3: Cross multiply
    21,439.79x = 29,586.87 × 13,056.29
  4. Step 4: Simplify right side
    21,439.79x = 386,294,754.91
  5. Step 5: Solve for x
    x = 386,294,754.91/21,439.79
  6. Step 6: Final answer
    x = 18,017.66

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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.