Home / 21,232.71-29,292.98-13,678.47

Finding the Fourth Proportional to 21,232.71, 29,292.98 and 13,678.47

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Solution

The fourth proportional to 21,232.71, 29,292.98 and 13,678.47 is: 18,871.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,232.71 : 29,292.98 = 13,678.47 : x
  2. Step 2: Convert to fraction form
    21,232.71/29,292.98 = 13,678.47/x
  3. Step 3: Cross multiply
    21,232.71x = 29,292.98 × 13,678.47
  4. Step 4: Simplify right side
    21,232.71x = 400,683,079.75
  5. Step 5: Solve for x
    x = 400,683,079.75/21,232.71
  6. Step 6: Final answer
    x = 18,871.03

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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.