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Finding the Fourth Proportional to 15,075.61, 20,801.65 and 9,103.28

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Solution

The fourth proportional to 15,075.61, 20,801.65 and 9,103.28 is: 12,560.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,075.61 : 20,801.65 = 9,103.28 : x
  2. Step 2: Convert to fraction form
    15,075.61/20,801.65 = 9,103.28/x
  3. Step 3: Cross multiply
    15,075.61x = 20,801.65 × 9,103.28
  4. Step 4: Simplify right side
    15,075.61x = 189,363,094.89
  5. Step 5: Solve for x
    x = 189,363,094.89/15,075.61
  6. Step 6: Final answer
    x = 12,560.90

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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.