Home / 15,293.40-21,109.38-9,989.04

Finding the Fourth Proportional to 15,293.40, 21,109.38 and 9,989.04

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Solution

The fourth proportional to 15,293.40, 21,109.38 and 9,989.04 is: 13,787.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,293.40 : 21,109.38 = 9,989.04 : x
  2. Step 2: Convert to fraction form
    15,293.40/21,109.38 = 9,989.04/x
  3. Step 3: Cross multiply
    15,293.40x = 21,109.38 × 9,989.04
  4. Step 4: Simplify right side
    15,293.40x = 210,862,441.20
  5. Step 5: Solve for x
    x = 210,862,441.20/15,293.40
  6. Step 6: Final answer
    x = 13,787.81

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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.