Home / 12,421.52-17,142.13-7,117.35

Finding the Fourth Proportional to 12,421.52, 17,142.13 and 7,117.35

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Solution

The fourth proportional to 12,421.52, 17,142.13 and 7,117.35 is: 9,822.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.52 : 17,142.13 = 7,117.35 : x
  2. Step 2: Convert to fraction form
    12,421.52/17,142.13 = 7,117.35/x
  3. Step 3: Cross multiply
    12,421.52x = 17,142.13 × 7,117.35
  4. Step 4: Simplify right side
    12,421.52x = 122,006,538.96
  5. Step 5: Solve for x
    x = 122,006,538.96/12,421.52
  6. Step 6: Final answer
    x = 9,822.19

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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.