Home / 42,717.72-64,090.28-20,532.70

Finding the Fourth Proportional to 42,717.72, 64,090.28 and 20,532.70

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Solution

The fourth proportional to 42,717.72, 64,090.28 and 20,532.70 is: 30,805.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,717.72 : 64,090.28 = 20,532.70 : x
  2. Step 2: Convert to fraction form
    42,717.72/64,090.28 = 20,532.70/x
  3. Step 3: Cross multiply
    42,717.72x = 64,090.28 × 20,532.70
  4. Step 4: Simplify right side
    42,717.72x = 1,315,946,492.16
  5. Step 5: Solve for x
    x = 1,315,946,492.16/42,717.72
  6. Step 6: Final answer
    x = 30,805.64

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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.