Home / 13,127.78-18,115.98-7,159.56

Finding the Fourth Proportional to 13,127.78, 18,115.98 and 7,159.56

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Solution

The fourth proportional to 13,127.78, 18,115.98 and 7,159.56 is: 9,880.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.78 : 18,115.98 = 7,159.56 : x
  2. Step 2: Convert to fraction form
    13,127.78/18,115.98 = 7,159.56/x
  3. Step 3: Cross multiply
    13,127.78x = 18,115.98 × 7,159.56
  4. Step 4: Simplify right side
    13,127.78x = 129,702,445.77
  5. Step 5: Solve for x
    x = 129,702,445.77/13,127.78
  6. Step 6: Final answer
    x = 9,880.00

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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.