Home / 13,127.84-18,116.10-7,159.64

Finding the Fourth Proportional to 13,127.84, 18,116.10 and 7,159.64

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Solution

The fourth proportional to 13,127.84, 18,116.10 and 7,159.64 is: 9,880.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.84 : 18,116.10 = 7,159.64 : x
  2. Step 2: Convert to fraction form
    13,127.84/18,116.10 = 7,159.64/x
  3. Step 3: Cross multiply
    13,127.84x = 18,116.10 × 7,159.64
  4. Step 4: Simplify right side
    13,127.84x = 129,704,754.20
  5. Step 5: Solve for x
    x = 129,704,754.20/13,127.84
  6. Step 6: Final answer
    x = 9,880.13

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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.