Home / 13,127.40-18,116.25-7,159.39

Finding the Fourth Proportional to 13,127.40, 18,116.25 and 7,159.39

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Solution

The fourth proportional to 13,127.40, 18,116.25 and 7,159.39 is: 9,880.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.40 : 18,116.25 = 7,159.39 : x
  2. Step 2: Convert to fraction form
    13,127.40/18,116.25 = 7,159.39/x
  3. Step 3: Cross multiply
    13,127.40x = 18,116.25 × 7,159.39
  4. Step 4: Simplify right side
    13,127.40x = 129,701,263.29
  5. Step 5: Solve for x
    x = 129,701,263.29/13,127.40
  6. Step 6: Final answer
    x = 9,880.20

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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.