Home / 13,730.55-18,947.40-7,761.84

Finding the Fourth Proportional to 13,730.55, 18,947.40 and 7,761.84

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Solution

The fourth proportional to 13,730.55, 18,947.40 and 7,761.84 is: 10,710.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,730.55 : 18,947.40 = 7,761.84 : x
  2. Step 2: Convert to fraction form
    13,730.55/18,947.40 = 7,761.84/x
  3. Step 3: Cross multiply
    13,730.55x = 18,947.40 × 7,761.84
  4. Step 4: Simplify right side
    13,730.55x = 147,066,687.22
  5. Step 5: Solve for x
    x = 147,066,687.22/13,730.55
  6. Step 6: Final answer
    x = 10,710.91

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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.