Home / 13,657.28-18,847.40-7,689.17

Finding the Fourth Proportional to 13,657.28, 18,847.40 and 7,689.17

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Solution

The fourth proportional to 13,657.28, 18,847.40 and 7,689.17 is: 10,611.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,657.28 : 18,847.40 = 7,689.17 : x
  2. Step 2: Convert to fraction form
    13,657.28/18,847.40 = 7,689.17/x
  3. Step 3: Cross multiply
    13,657.28x = 18,847.40 × 7,689.17
  4. Step 4: Simplify right side
    13,657.28x = 144,920,862.66
  5. Step 5: Solve for x
    x = 144,920,862.66/13,657.28
  6. Step 6: Final answer
    x = 10,611.25

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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.