Home / 9,102.57-12,561.23-5,123.45

Finding the Fourth Proportional to 9,102.57, 12,561.23 and 5,123.45

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Solution

The fourth proportional to 9,102.57, 12,561.23 and 5,123.45 is: 7,070.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,102.57 : 12,561.23 = 5,123.45 : x
  2. Step 2: Convert to fraction form
    9,102.57/12,561.23 = 5,123.45/x
  3. Step 3: Cross multiply
    9,102.57x = 12,561.23 × 5,123.45
  4. Step 4: Simplify right side
    9,102.57x = 64,356,745.42
  5. Step 5: Solve for x
    x = 64,356,745.42/9,102.57
  6. Step 6: Final answer
    x = 7,070.17

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Half scale
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Double scale
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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.