Home / 28,456.02-39,267.72-15,881.58

Finding the Fourth Proportional to 28,456.02, 39,267.72 and 15,881.58

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Solution

The fourth proportional to 28,456.02, 39,267.72 and 15,881.58 is: 21,915.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,456.02 : 39,267.72 = 15,881.58 : x
  2. Step 2: Convert to fraction form
    28,456.02/39,267.72 = 15,881.58/x
  3. Step 3: Cross multiply
    28,456.02x = 39,267.72 × 15,881.58
  4. Step 4: Simplify right side
    28,456.02x = 623,633,436.60
  5. Step 5: Solve for x
    x = 623,633,436.60/28,456.02
  6. Step 6: Final answer
    x = 21,915.69

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Double scale
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Similar ratio
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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.