Home / 11,139.70-15,356.50-8,482.50

Finding the Fourth Proportional to 11,139.70, 15,356.50 and 8,482.50

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Solution

The fourth proportional to 11,139.70, 15,356.50 and 8,482.50 is: 11,693.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.70 : 15,356.50 = 8,482.50 : x
  2. Step 2: Convert to fraction form
    11,139.70/15,356.50 = 8,482.50/x
  3. Step 3: Cross multiply
    11,139.70x = 15,356.50 × 8,482.50
  4. Step 4: Simplify right side
    11,139.70x = 130,261,511.25
  5. Step 5: Solve for x
    x = 130,261,511.25/11,139.70
  6. Step 6: Final answer
    x = 11,693.45

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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.