Home / 15,128.14-20,881.38-9,823.72

Finding the Fourth Proportional to 15,128.14, 20,881.38 and 9,823.72

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Solution

The fourth proportional to 15,128.14, 20,881.38 and 9,823.72 is: 13,559.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.14 : 20,881.38 = 9,823.72 : x
  2. Step 2: Convert to fraction form
    15,128.14/20,881.38 = 9,823.72/x
  3. Step 3: Cross multiply
    15,128.14x = 20,881.38 × 9,823.72
  4. Step 4: Simplify right side
    15,128.14x = 205,132,830.33
  5. Step 5: Solve for x
    x = 205,132,830.33/15,128.14
  6. Step 6: Final answer
    x = 13,559.69

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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.