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Finding the Fourth Proportional to 10,959.19, 15,123.71 and 6,979.46

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Solution

The fourth proportional to 10,959.19, 15,123.71 and 6,979.46 is: 9,631.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,959.19 : 15,123.71 = 6,979.46 : x
  2. Step 2: Convert to fraction form
    10,959.19/15,123.71 = 6,979.46/x
  3. Step 3: Cross multiply
    10,959.19x = 15,123.71 × 6,979.46
  4. Step 4: Simplify right side
    10,959.19x = 105,555,270.83
  5. Step 5: Solve for x
    x = 105,555,270.83/10,959.19
  6. Step 6: Final answer
    x = 9,631.67

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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.