Home / 10,877.70-15,018.45-8,355.30

Finding the Fourth Proportional to 10,877.70, 15,018.45 and 8,355.30

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Solution

The fourth proportional to 10,877.70, 15,018.45 and 8,355.30 is: 11,535.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,877.70 : 15,018.45 = 8,355.30 : x
  2. Step 2: Convert to fraction form
    10,877.70/15,018.45 = 8,355.30/x
  3. Step 3: Cross multiply
    10,877.70x = 15,018.45 × 8,355.30
  4. Step 4: Simplify right side
    10,877.70x = 125,483,538.42
  5. Step 5: Solve for x
    x = 125,483,538.42/10,877.70
  6. Step 6: Final answer
    x = 11,535.86

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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.