Home / 20,585.09-28,386.60-18,309.24

Finding the Fourth Proportional to 20,585.09, 28,386.60 and 18,309.24

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Solution

The fourth proportional to 20,585.09, 28,386.60 and 18,309.24 is: 25,248.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.09 : 28,386.60 = 18,309.24 : x
  2. Step 2: Convert to fraction form
    20,585.09/28,386.60 = 18,309.24/x
  3. Step 3: Cross multiply
    20,585.09x = 28,386.60 × 18,309.24
  4. Step 4: Simplify right side
    20,585.09x = 519,737,072.18
  5. Step 5: Solve for x
    x = 519,737,072.18/20,585.09
  6. Step 6: Final answer
    x = 25,248.23

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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.