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Finding the Fourth Proportional to 56,479.40, 84,719.10 and 14,359.40

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Solution

The fourth proportional to 56,479.40, 84,719.10 and 14,359.40 is: 21,539.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,479.40 : 84,719.10 = 14,359.40 : x
  2. Step 2: Convert to fraction form
    56,479.40/84,719.10 = 14,359.40/x
  3. Step 3: Cross multiply
    56,479.40x = 84,719.10 × 14,359.40
  4. Step 4: Simplify right side
    56,479.40x = 1,216,515,444.54
  5. Step 5: Solve for x
    x = 1,216,515,444.54/56,479.40
  6. Step 6: Final answer
    x = 21,539.10

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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.