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Finding the Fourth Proportional to 18,630.72, 27,946.08 and 4,779.72

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Solution

The fourth proportional to 18,630.72, 27,946.08 and 4,779.72 is: 7,169.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,630.72 : 27,946.08 = 4,779.72 : x
  2. Step 2: Convert to fraction form
    18,630.72/27,946.08 = 4,779.72/x
  3. Step 3: Cross multiply
    18,630.72x = 27,946.08 × 4,779.72
  4. Step 4: Simplify right side
    18,630.72x = 133,574,437.50
  5. Step 5: Solve for x
    x = 133,574,437.50/18,630.72
  6. Step 6: Final answer
    x = 7,169.58

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.