Home / 28,106.87-38,787.48-15,531.62

Finding the Fourth Proportional to 28,106.87, 38,787.48 and 15,531.62

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Solution

The fourth proportional to 28,106.87, 38,787.48 and 15,531.62 is: 21,433.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,106.87 : 38,787.48 = 15,531.62 : x
  2. Step 2: Convert to fraction form
    28,106.87/38,787.48 = 15,531.62/x
  3. Step 3: Cross multiply
    28,106.87x = 38,787.48 × 15,531.62
  4. Step 4: Simplify right side
    28,106.87x = 602,432,206.18
  5. Step 5: Solve for x
    x = 602,432,206.18/28,106.87
  6. Step 6: Final answer
    x = 21,433.63

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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.