Home / 13,127.79-18,116.50-7,159.40

Finding the Fourth Proportional to 13,127.79, 18,116.50 and 7,159.40

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Solution

The fourth proportional to 13,127.79, 18,116.50 and 7,159.40 is: 9,880.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.79 : 18,116.50 = 7,159.40 : x
  2. Step 2: Convert to fraction form
    13,127.79/18,116.50 = 7,159.40/x
  3. Step 3: Cross multiply
    13,127.79x = 18,116.50 × 7,159.40
  4. Step 4: Simplify right side
    13,127.79x = 129,703,270.10
  5. Step 5: Solve for x
    x = 129,703,270.10/13,127.79
  6. Step 6: Final answer
    x = 9,880.05

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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.