Home / 11,421.12-15,761.28-6,705.48

Finding the Fourth Proportional to 11,421.12, 15,761.28 and 6,705.48

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Solution

The fourth proportional to 11,421.12, 15,761.28 and 6,705.48 is: 9,253.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.12 : 15,761.28 = 6,705.48 : x
  2. Step 2: Convert to fraction form
    11,421.12/15,761.28 = 6,705.48/x
  3. Step 3: Cross multiply
    11,421.12x = 15,761.28 × 6,705.48
  4. Step 4: Simplify right side
    11,421.12x = 105,686,947.81
  5. Step 5: Solve for x
    x = 105,686,947.81/11,421.12
  6. Step 6: Final answer
    x = 9,253.64

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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.