Home / 13,135.61-18,127.08-7,167.60

Finding the Fourth Proportional to 13,135.61, 18,127.08 and 7,167.60

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Solution

The fourth proportional to 13,135.61, 18,127.08 and 7,167.60 is: 9,891.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.61 : 18,127.08 = 7,167.60 : x
  2. Step 2: Convert to fraction form
    13,135.61/18,127.08 = 7,167.60/x
  3. Step 3: Cross multiply
    13,135.61x = 18,127.08 × 7,167.60
  4. Step 4: Simplify right side
    13,135.61x = 129,927,658.61
  5. Step 5: Solve for x
    x = 129,927,658.61/13,135.61
  6. Step 6: Final answer
    x = 9,891.25

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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.