Home / 10,938.34-15,099.96-7,161.70

Finding the Fourth Proportional to 10,938.34, 15,099.96 and 7,161.70

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Solution

The fourth proportional to 10,938.34, 15,099.96 and 7,161.70 is: 9,886.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,938.34 : 15,099.96 = 7,161.70 : x
  2. Step 2: Convert to fraction form
    10,938.34/15,099.96 = 7,161.70/x
  3. Step 3: Cross multiply
    10,938.34x = 15,099.96 × 7,161.70
  4. Step 4: Simplify right side
    10,938.34x = 108,141,383.53
  5. Step 5: Solve for x
    x = 108,141,383.53/10,938.34
  6. Step 6: Final answer
    x = 9,886.45

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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.