Home / 28,515.71-39,351.93-15,769.74

Finding the Fourth Proportional to 28,515.71, 39,351.93 and 15,769.74

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Solution

The fourth proportional to 28,515.71, 39,351.93 and 15,769.74 is: 21,762.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.71 : 39,351.93 = 15,769.74 : x
  2. Step 2: Convert to fraction form
    28,515.71/39,351.93 = 15,769.74/x
  3. Step 3: Cross multiply
    28,515.71x = 39,351.93 × 15,769.74
  4. Step 4: Simplify right side
    28,515.71x = 620,569,724.13
  5. Step 5: Solve for x
    x = 620,569,724.13/28,515.71
  6. Step 6: Final answer
    x = 21,762.38

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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.