Home / 12,813.28-17,681.52-7,148.86

Finding the Fourth Proportional to 12,813.28, 17,681.52 and 7,148.86

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Solution

The fourth proportional to 12,813.28, 17,681.52 and 7,148.86 is: 9,864.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,813.28 : 17,681.52 = 7,148.86 : x
  2. Step 2: Convert to fraction form
    12,813.28/17,681.52 = 7,148.86/x
  3. Step 3: Cross multiply
    12,813.28x = 17,681.52 × 7,148.86
  4. Step 4: Simplify right side
    12,813.28x = 126,402,711.07
  5. Step 5: Solve for x
    x = 126,402,711.07/12,813.28
  6. Step 6: Final answer
    x = 9,864.98

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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.