Home / 21,420.60-29,520.36-15,442.08

Finding the Fourth Proportional to 21,420.60, 29,520.36 and 15,442.08

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Solution

The fourth proportional to 21,420.60, 29,520.36 and 15,442.08 is: 21,281.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.60 : 29,520.36 = 15,442.08 : x
  2. Step 2: Convert to fraction form
    21,420.60/29,520.36 = 15,442.08/x
  3. Step 3: Cross multiply
    21,420.60x = 29,520.36 × 15,442.08
  4. Step 4: Simplify right side
    21,420.60x = 455,855,760.75
  5. Step 5: Solve for x
    x = 455,855,760.75/21,420.60
  6. Step 6: Final answer
    x = 21,281.19

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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.