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Finding the Fourth Proportional to 28,111.52, 38,810.04 and 17,515.28

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Solution

The fourth proportional to 28,111.52, 38,810.04 and 17,515.28 is: 24,181.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,111.52 : 38,810.04 = 17,515.28 : x
  2. Step 2: Convert to fraction form
    28,111.52/38,810.04 = 17,515.28/x
  3. Step 3: Cross multiply
    28,111.52x = 38,810.04 × 17,515.28
  4. Step 4: Simplify right side
    28,111.52x = 679,768,717.41
  5. Step 5: Solve for x
    x = 679,768,717.41/28,111.52
  6. Step 6: Final answer
    x = 24,181.14

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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.