Home / 21,275.79-29,350.74-13,724.55

Finding the Fourth Proportional to 21,275.79, 29,350.74 and 13,724.55

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Solution

The fourth proportional to 21,275.79, 29,350.74 and 13,724.55 is: 18,933.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.79 : 29,350.74 = 13,724.55 : x
  2. Step 2: Convert to fraction form
    21,275.79/29,350.74 = 13,724.55/x
  3. Step 3: Cross multiply
    21,275.79x = 29,350.74 × 13,724.55
  4. Step 4: Simplify right side
    21,275.79x = 402,825,778.13
  5. Step 5: Solve for x
    x = 402,825,778.13/21,275.79
  6. Step 6: Final answer
    x = 18,933.53

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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.