Home / 9,897.35-13,658.31-5,421.20

Finding the Fourth Proportional to 9,897.35, 13,658.31 and 5,421.20

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Solution

The fourth proportional to 9,897.35, 13,658.31 and 5,421.20 is: 7,481.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,897.35 : 13,658.31 = 5,421.20 : x
  2. Step 2: Convert to fraction form
    9,897.35/13,658.31 = 5,421.20/x
  3. Step 3: Cross multiply
    9,897.35x = 13,658.31 × 5,421.20
  4. Step 4: Simplify right side
    9,897.35x = 74,044,361.88
  5. Step 5: Solve for x
    x = 74,044,361.88/9,897.35
  6. Step 6: Final answer
    x = 7,481.23

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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.