Home / 55,428.08-83,142.24-13,875.20

Finding the Fourth Proportional to 55,428.08, 83,142.24 and 13,875.20

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Solution

The fourth proportional to 55,428.08, 83,142.24 and 13,875.20 is: 20,812.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,428.08 : 83,142.24 = 13,875.20 : x
  2. Step 2: Convert to fraction form
    55,428.08/83,142.24 = 13,875.20/x
  3. Step 3: Cross multiply
    55,428.08x = 83,142.24 × 13,875.20
  4. Step 4: Simplify right side
    55,428.08x = 1,153,615,208.45
  5. Step 5: Solve for x
    x = 1,153,615,208.45/55,428.08
  6. Step 6: Final answer
    x = 20,812.83

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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.