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Finding the Fourth Proportional to 28,330.98, 42,497.98 and 7,271.20

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Solution

The fourth proportional to 28,330.98, 42,497.98 and 7,271.20 is: 10,907.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,330.98 : 42,497.98 = 7,271.20 : x
  2. Step 2: Convert to fraction form
    28,330.98/42,497.98 = 7,271.20/x
  3. Step 3: Cross multiply
    28,330.98x = 42,497.98 × 7,271.20
  4. Step 4: Simplify right side
    28,330.98x = 309,011,388.02
  5. Step 5: Solve for x
    x = 309,011,388.02/28,330.98
  6. Step 6: Final answer
    x = 10,907.19

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1.5x scale

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.