Home / 21,030.90-29,019.02-12,531.98

Finding the Fourth Proportional to 21,030.90, 29,019.02 and 12,531.98

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Solution

The fourth proportional to 21,030.90, 29,019.02 and 12,531.98 is: 17,291.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.90 : 29,019.02 = 12,531.98 : x
  2. Step 2: Convert to fraction form
    21,030.90/29,019.02 = 12,531.98/x
  3. Step 3: Cross multiply
    21,030.90x = 29,019.02 × 12,531.98
  4. Step 4: Simplify right side
    21,030.90x = 363,665,778.26
  5. Step 5: Solve for x
    x = 363,665,778.26/21,030.90
  6. Step 6: Final answer
    x = 17,291.97

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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.