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Finding the Fourth Proportional to 9,347.40, 13,057.20 and 9,347.40

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Solution

The fourth proportional to 9,347.40, 13,057.20 and 9,347.40 is: 13,057.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,347.40 : 13,057.20 = 9,347.40 : x
  2. Step 2: Convert to fraction form
    9,347.40/13,057.20 = 9,347.40/x
  3. Step 3: Cross multiply
    9,347.40x = 13,057.20 × 9,347.40
  4. Step 4: Simplify right side
    9,347.40x = 122,050,871.28
  5. Step 5: Solve for x
    x = 122,050,871.28/9,347.40
  6. Step 6: Final answer
    x = 13,057.20

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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 (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.