Home / 28,005.53-38,648.09-15,430.28

Finding the Fourth Proportional to 28,005.53, 38,648.09 and 15,430.28

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Solution

The fourth proportional to 28,005.53, 38,648.09 and 15,430.28 is: 21,294.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,005.53 : 38,648.09 = 15,430.28 : x
  2. Step 2: Convert to fraction form
    28,005.53/38,648.09 = 15,430.28/x
  3. Step 3: Cross multiply
    28,005.53x = 38,648.09 × 15,430.28
  4. Step 4: Simplify right side
    28,005.53x = 596,350,773.01
  5. Step 5: Solve for x
    x = 596,350,773.01/28,005.53
  6. Step 6: Final answer
    x = 21,294.04

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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.