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Finding the Fourth Proportional to 39,692.68, 54,775.69 and 21,543.01

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Solution

The fourth proportional to 39,692.68, 54,775.69 and 21,543.01 is: 29,729.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,692.68 : 54,775.69 = 21,543.01 : x
  2. Step 2: Convert to fraction form
    39,692.68/54,775.69 = 21,543.01/x
  3. Step 3: Cross multiply
    39,692.68x = 54,775.69 × 21,543.01
  4. Step 4: Simplify right side
    39,692.68x = 1,180,033,475.92
  5. Step 5: Solve for x
    x = 1,180,033,475.92/39,692.68
  6. Step 6: Final answer
    x = 29,729.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.