Home / 20,585.75-28,407.31-11,510.51

Finding the Fourth Proportional to 20,585.75, 28,407.31 and 11,510.51

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Solution

The fourth proportional to 20,585.75, 28,407.31 and 11,510.51 is: 15,883.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.75 : 28,407.31 = 11,510.51 : x
  2. Step 2: Convert to fraction form
    20,585.75/28,407.31 = 11,510.51/x
  3. Step 3: Cross multiply
    20,585.75x = 28,407.31 × 11,510.51
  4. Step 4: Simplify right side
    20,585.75x = 326,982,455.02
  5. Step 5: Solve for x
    x = 326,982,455.02/20,585.75
  6. Step 6: Final answer
    x = 15,883.93

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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.