Home / 28,729.18-39,641.40-15,980.68

Finding the Fourth Proportional to 28,729.18, 39,641.40 and 15,980.68

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Solution

The fourth proportional to 28,729.18, 39,641.40 and 15,980.68 is: 22,050.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,729.18 : 39,641.40 = 15,980.68 : x
  2. Step 2: Convert to fraction form
    28,729.18/39,641.40 = 15,980.68/x
  3. Step 3: Cross multiply
    28,729.18x = 39,641.40 × 15,980.68
  4. Step 4: Simplify right side
    28,729.18x = 633,496,528.15
  5. Step 5: Solve for x
    x = 633,496,528.15/28,729.18
  6. Step 6: Final answer
    x = 22,050.63

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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.