Home / 21,251.81-29,327.65-13,298.55

Finding the Fourth Proportional to 21,251.81, 29,327.65 and 13,298.55

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Solution

The fourth proportional to 21,251.81, 29,327.65 and 13,298.55 is: 18,352.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.81 : 29,327.65 = 13,298.55 : x
  2. Step 2: Convert to fraction form
    21,251.81/29,327.65 = 13,298.55/x
  3. Step 3: Cross multiply
    21,251.81x = 29,327.65 × 13,298.55
  4. Step 4: Simplify right side
    21,251.81x = 390,015,186.66
  5. Step 5: Solve for x
    x = 390,015,186.66/21,251.81
  6. Step 6: Final answer
    x = 18,352.10

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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.