Home / 12,378.30-18,567.45-11,248.35

Finding the Fourth Proportional to 12,378.30, 18,567.45 and 11,248.35

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Solution

The fourth proportional to 12,378.30, 18,567.45 and 11,248.35 is: 16,872.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.30 : 18,567.45 = 11,248.35 : x
  2. Step 2: Convert to fraction form
    12,378.30/18,567.45 = 11,248.35/x
  3. Step 3: Cross multiply
    12,378.30x = 18,567.45 × 11,248.35
  4. Step 4: Simplify right side
    12,378.30x = 208,853,176.21
  5. Step 5: Solve for x
    x = 208,853,176.21/12,378.30
  6. Step 6: Final answer
    x = 16,872.53

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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.