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Finding the Fourth Proportional to 9,871.92, 13,603.68 and 9,749.28

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Solution

The fourth proportional to 9,871.92, 13,603.68 and 9,749.28 is: 13,434.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,871.92 : 13,603.68 = 9,749.28 : x
  2. Step 2: Convert to fraction form
    9,871.92/13,603.68 = 9,749.28/x
  3. Step 3: Cross multiply
    9,871.92x = 13,603.68 × 9,749.28
  4. Step 4: Simplify right side
    9,871.92x = 132,626,085.35
  5. Step 5: Solve for x
    x = 132,626,085.35/9,871.92
  6. Step 6: Final answer
    x = 13,434.68

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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.