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Finding the Fourth Proportional to 8,765.45, 12,075.12 and 7,502.45

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Solution

The fourth proportional to 8,765.45, 12,075.12 and 7,502.45 is: 10,335.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,765.45 : 12,075.12 = 7,502.45 : x
  2. Step 2: Convert to fraction form
    8,765.45/12,075.12 = 7,502.45/x
  3. Step 3: Cross multiply
    8,765.45x = 12,075.12 × 7,502.45
  4. Step 4: Simplify right side
    8,765.45x = 90,592,984.04
  5. Step 5: Solve for x
    x = 90,592,984.04/8,765.45
  6. Step 6: Final answer
    x = 10,335.23

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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.