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Finding the Fourth Proportional to 43,130.87, 64,692.03 and 13,547.91

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Solution

The fourth proportional to 43,130.87, 64,692.03 and 13,547.91 is: 20,320.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,130.87 : 64,692.03 = 13,547.91 : x
  2. Step 2: Convert to fraction form
    43,130.87/64,692.03 = 13,547.91/x
  3. Step 3: Cross multiply
    43,130.87x = 64,692.03 × 13,547.91
  4. Step 4: Simplify right side
    43,130.87x = 876,441,800.16
  5. Step 5: Solve for x
    x = 876,441,800.16/43,130.87
  6. Step 6: Final answer
    x = 20,320.52

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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.