Home / 42,747.60-64,111.68-20,547.12

Finding the Fourth Proportional to 42,747.60, 64,111.68 and 20,547.12

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Solution

The fourth proportional to 42,747.60, 64,111.68 and 20,547.12 is: 30,816.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,747.60 : 64,111.68 = 20,547.12 : x
  2. Step 2: Convert to fraction form
    42,747.60/64,111.68 = 20,547.12/x
  3. Step 3: Cross multiply
    42,747.60x = 64,111.68 × 20,547.12
  4. Step 4: Simplify right side
    42,747.60x = 1,317,310,382.36
  5. Step 5: Solve for x
    x = 1,317,310,382.36/42,747.60
  6. Step 6: Final answer
    x = 30,816.01

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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.