Home / 12,742.79-17,584.70-7,077.51

Finding the Fourth Proportional to 12,742.79, 17,584.70 and 7,077.51

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Solution

The fourth proportional to 12,742.79, 17,584.70 and 7,077.51 is: 9,766.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,742.79 : 17,584.70 = 7,077.51 : x
  2. Step 2: Convert to fraction form
    12,742.79/17,584.70 = 7,077.51/x
  3. Step 3: Cross multiply
    12,742.79x = 17,584.70 × 7,077.51
  4. Step 4: Simplify right side
    12,742.79x = 124,455,854.71
  5. Step 5: Solve for x
    x = 124,455,854.71/12,742.79
  6. Step 6: Final answer
    x = 9,766.77

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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.