Home / 13,159.38-18,159.40-7,785.30

Finding the Fourth Proportional to 13,159.38, 18,159.40 and 7,785.30

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Solution

The fourth proportional to 13,159.38, 18,159.40 and 7,785.30 is: 10,743.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,159.38 : 18,159.40 = 7,785.30 : x
  2. Step 2: Convert to fraction form
    13,159.38/18,159.40 = 7,785.30/x
  3. Step 3: Cross multiply
    13,159.38x = 18,159.40 × 7,785.30
  4. Step 4: Simplify right side
    13,159.38x = 141,376,376.82
  5. Step 5: Solve for x
    x = 141,376,376.82/13,159.38
  6. Step 6: Final answer
    x = 10,743.39

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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.