Home / 28,144.80-38,839.28-15,569.55

Finding the Fourth Proportional to 28,144.80, 38,839.28 and 15,569.55

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Solution

The fourth proportional to 28,144.80, 38,839.28 and 15,569.55 is: 21,485.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,144.80 : 38,839.28 = 15,569.55 : x
  2. Step 2: Convert to fraction form
    28,144.80/38,839.28 = 15,569.55/x
  3. Step 3: Cross multiply
    28,144.80x = 38,839.28 × 15,569.55
  4. Step 4: Simplify right side
    28,144.80x = 604,710,111.92
  5. Step 5: Solve for x
    x = 604,710,111.92/28,144.80
  6. Step 6: Final answer
    x = 21,485.68

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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.