Home / 18,312.12-25,288.64-15,643.96

Finding the Fourth Proportional to 18,312.12, 25,288.64 and 15,643.96

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Solution

The fourth proportional to 18,312.12, 25,288.64 and 15,643.96 is: 21,603.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,312.12 : 25,288.64 = 15,643.96 : x
  2. Step 2: Convert to fraction form
    18,312.12/25,288.64 = 15,643.96/x
  3. Step 3: Cross multiply
    18,312.12x = 25,288.64 × 15,643.96
  4. Step 4: Simplify right side
    18,312.12x = 395,614,472.61
  5. Step 5: Solve for x
    x = 395,614,472.61/18,312.12
  6. Step 6: Final answer
    x = 21,603.97

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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.