Home / 21,319.15-29,420.62-12,366.80

Finding the Fourth Proportional to 21,319.15, 29,420.62 and 12,366.80

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Solution

The fourth proportional to 21,319.15, 29,420.62 and 12,366.80 is: 17,066.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.15 : 29,420.62 = 12,366.80 : x
  2. Step 2: Convert to fraction form
    21,319.15/29,420.62 = 12,366.80/x
  3. Step 3: Cross multiply
    21,319.15x = 29,420.62 × 12,366.80
  4. Step 4: Simplify right side
    21,319.15x = 363,838,938.47
  5. Step 5: Solve for x
    x = 363,838,938.47/21,319.15
  6. Step 6: Final answer
    x = 17,066.30

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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.