Home / 20,612.14-28,459.16-18,203.68

Finding the Fourth Proportional to 20,612.14, 28,459.16 and 18,203.68

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Solution

The fourth proportional to 20,612.14, 28,459.16 and 18,203.68 is: 25,133.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.14 : 28,459.16 = 18,203.68 : x
  2. Step 2: Convert to fraction form
    20,612.14/28,459.16 = 18,203.68/x
  3. Step 3: Cross multiply
    20,612.14x = 28,459.16 × 18,203.68
  4. Step 4: Simplify right side
    20,612.14x = 518,061,441.71
  5. Step 5: Solve for x
    x = 518,061,441.71/20,612.14
  6. Step 6: Final answer
    x = 25,133.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.