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Finding the Fourth Proportional to 22,393, 30,928.28 and 15,307.12

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Solution

The fourth proportional to 22,393, 30,928.28 and 15,307.12 is: 21,141.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,393 : 30,928.28 = 15,307.12 : x
  2. Step 2: Convert to fraction form
    22,393/30,928.28 = 15,307.12/x
  3. Step 3: Cross multiply
    22,393x = 30,928.28 × 15,307.12
  4. Step 4: Simplify right side
    22,393x = 473,422,893.35
  5. Step 5: Solve for x
    x = 473,422,893.35/22,393
  6. Step 6: Final answer
    x = 21,141.56

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Half scale
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Double scale
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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.