Home / 12,417.90-17,136.66-7,112.70

Finding the Fourth Proportional to 12,417.90, 17,136.66 and 7,112.70

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Solution

The fourth proportional to 12,417.90, 17,136.66 and 7,112.70 is: 9,815.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,417.90 : 17,136.66 = 7,112.70 : x
  2. Step 2: Convert to fraction form
    12,417.90/17,136.66 = 7,112.70/x
  3. Step 3: Cross multiply
    12,417.90x = 17,136.66 × 7,112.70
  4. Step 4: Simplify right side
    12,417.90x = 121,887,921.58
  5. Step 5: Solve for x
    x = 121,887,921.58/12,417.90
  6. Step 6: Final answer
    x = 9,815.50

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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.