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Finding the Fourth Proportional to 28,038.00, 38,692.47 and 15,291.20

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Solution

The fourth proportional to 28,038.00, 38,692.47 and 15,291.20 is: 21,101.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,038.00 : 38,692.47 = 15,291.20 : x
  2. Step 2: Convert to fraction form
    28,038.00/38,692.47 = 15,291.20/x
  3. Step 3: Cross multiply
    28,038.00x = 38,692.47 × 15,291.20
  4. Step 4: Simplify right side
    28,038.00x = 591,654,162.30
  5. Step 5: Solve for x
    x = 591,654,162.30/28,038.00
  6. Step 6: Final answer
    x = 21,101.87

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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.