Home / 21,018.60-29,000.16-12,520.08

Finding the Fourth Proportional to 21,018.60, 29,000.16 and 12,520.08

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Solution

The fourth proportional to 21,018.60, 29,000.16 and 12,520.08 is: 17,274.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.60 : 29,000.16 = 12,520.08 : x
  2. Step 2: Convert to fraction form
    21,018.60/29,000.16 = 12,520.08/x
  3. Step 3: Cross multiply
    21,018.60x = 29,000.16 × 12,520.08
  4. Step 4: Simplify right side
    21,018.60x = 363,084,323.21
  5. Step 5: Solve for x
    x = 363,084,323.21/21,018.60
  6. Step 6: Final answer
    x = 17,274.43

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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.