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Finding the Fourth Proportional to 48,459.65, 72,690.03 and 12,920.76

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Solution

The fourth proportional to 48,459.65, 72,690.03 and 12,920.76 is: 19,381.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,459.65 : 72,690.03 = 12,920.76 : x
  2. Step 2: Convert to fraction form
    48,459.65/72,690.03 = 12,920.76/x
  3. Step 3: Cross multiply
    48,459.65x = 72,690.03 × 12,920.76
  4. Step 4: Simplify right side
    48,459.65x = 939,210,432.02
  5. Step 5: Solve for x
    x = 939,210,432.02/48,459.65
  6. Step 6: Final answer
    x = 19,381.29

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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.