Home / 21,362.40-29,445.12-15,385.68

Finding the Fourth Proportional to 21,362.40, 29,445.12 and 15,385.68

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Solution

The fourth proportional to 21,362.40, 29,445.12 and 15,385.68 is: 21,207.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,362.40 : 29,445.12 = 15,385.68 : x
  2. Step 2: Convert to fraction form
    21,362.40/29,445.12 = 15,385.68/x
  3. Step 3: Cross multiply
    21,362.40x = 29,445.12 × 15,385.68
  4. Step 4: Simplify right side
    21,362.40x = 453,033,193.88
  5. Step 5: Solve for x
    x = 453,033,193.88/21,362.40
  6. Step 6: Final answer
    x = 21,207.04

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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.