Home / 28,445.81-39,252.89-15,870.29

Finding the Fourth Proportional to 28,445.81, 39,252.89 and 15,870.29

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Solution

The fourth proportional to 28,445.81, 39,252.89 and 15,870.29 is: 21,899.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,445.81 : 39,252.89 = 15,870.29 : x
  2. Step 2: Convert to fraction form
    28,445.81/39,252.89 = 15,870.29/x
  3. Step 3: Cross multiply
    28,445.81x = 39,252.89 × 15,870.29
  4. Step 4: Simplify right side
    28,445.81x = 622,954,668.29
  5. Step 5: Solve for x
    x = 622,954,668.29/28,445.81
  6. Step 6: Final answer
    x = 21,899.70

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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.