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Finding the Fourth Proportional to 43,045.36, 64,580.80 and 20,572.80

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Solution

The fourth proportional to 43,045.36, 64,580.80 and 20,572.80 is: 30,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,045.36 : 64,580.80 = 20,572.80 : x
  2. Step 2: Convert to fraction form
    43,045.36/64,580.80 = 20,572.80/x
  3. Step 3: Cross multiply
    43,045.36x = 64,580.80 × 20,572.80
  4. Step 4: Simplify right side
    43,045.36x = 1,328,607,882.24
  5. Step 5: Solve for x
    x = 1,328,607,882.24/43,045.36
  6. Step 6: Final answer
    x = 30,865.30

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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.