Home / 15,788.68-21,787.32-8,715.13

Finding the Fourth Proportional to 15,788.68, 21,787.32 and 8,715.13

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Solution

The fourth proportional to 15,788.68, 21,787.32 and 8,715.13 is: 12,026.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.68 : 21,787.32 = 8,715.13 : x
  2. Step 2: Convert to fraction form
    15,788.68/21,787.32 = 8,715.13/x
  3. Step 3: Cross multiply
    15,788.68x = 21,787.32 × 8,715.13
  4. Step 4: Simplify right side
    15,788.68x = 189,879,326.15
  5. Step 5: Solve for x
    x = 189,879,326.15/15,788.68
  6. Step 6: Final answer
    x = 12,026.30

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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.