Home / 28,430.40-39,232.19-15,683.75

Finding the Fourth Proportional to 28,430.40, 39,232.19 and 15,683.75

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Solution

The fourth proportional to 28,430.40, 39,232.19 and 15,683.75 is: 21,642.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.40 : 39,232.19 = 15,683.75 : x
  2. Step 2: Convert to fraction form
    28,430.40/39,232.19 = 15,683.75/x
  3. Step 3: Cross multiply
    28,430.40x = 39,232.19 × 15,683.75
  4. Step 4: Simplify right side
    28,430.40x = 615,307,585.33
  5. Step 5: Solve for x
    x = 615,307,585.33/28,430.40
  6. Step 6: Final answer
    x = 21,642.59

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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.