Home / 15,776.35-21,768.47-12,787.04

Finding the Fourth Proportional to 15,776.35, 21,768.47 and 12,787.04

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Solution

The fourth proportional to 15,776.35, 21,768.47 and 12,787.04 is: 17,643.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,776.35 : 21,768.47 = 12,787.04 : x
  2. Step 2: Convert to fraction form
    15,776.35/21,768.47 = 12,787.04/x
  3. Step 3: Cross multiply
    15,776.35x = 21,768.47 × 12,787.04
  4. Step 4: Simplify right side
    15,776.35x = 278,354,296.63
  5. Step 5: Solve for x
    x = 278,354,296.63/15,776.35
  6. Step 6: Final answer
    x = 17,643.77

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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.