Home / 28,605.81-39,472.35-15,858.86

Finding the Fourth Proportional to 28,605.81, 39,472.35 and 15,858.86

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Solution

The fourth proportional to 28,605.81, 39,472.35 and 15,858.86 is: 21,883.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,605.81 : 39,472.35 = 15,858.86 : x
  2. Step 2: Convert to fraction form
    28,605.81/39,472.35 = 15,858.86/x
  3. Step 3: Cross multiply
    28,605.81x = 39,472.35 × 15,858.86
  4. Step 4: Simplify right side
    28,605.81x = 625,986,615.64
  5. Step 5: Solve for x
    x = 625,986,615.64/28,605.81
  6. Step 6: Final answer
    x = 21,883.20

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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.