Home / 19,660.32-27,158.76-13,689

Finding the Fourth Proportional to 19,660.32, 27,158.76 and 13,689

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Solution

The fourth proportional to 19,660.32, 27,158.76 and 13,689 is: 18,909.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,660.32 : 27,158.76 = 13,689 : x
  2. Step 2: Convert to fraction form
    19,660.32/27,158.76 = 13,689/x
  3. Step 3: Cross multiply
    19,660.32x = 27,158.76 × 13,689
  4. Step 4: Simplify right side
    19,660.32x = 371,776,265.64
  5. Step 5: Solve for x
    x = 371,776,265.64/19,660.32
  6. Step 6: Final answer
    x = 18,909.98

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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.