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Finding the Fourth Proportional to 20,459.25, 30,660.88 and 15,457.51

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Solution

The fourth proportional to 20,459.25, 30,660.88 and 15,457.51 is: 23,165.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,459.25 : 30,660.88 = 15,457.51 : x
  2. Step 2: Convert to fraction form
    20,459.25/30,660.88 = 15,457.51/x
  3. Step 3: Cross multiply
    20,459.25x = 30,660.88 × 15,457.51
  4. Step 4: Simplify right side
    20,459.25x = 473,940,781.92
  5. Step 5: Solve for x
    x = 473,940,781.92/20,459.25
  6. Step 6: Final answer
    x = 23,165.11

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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.