Home / 28,616.32-42,915.75-19,788.40

Finding the Fourth Proportional to 28,616.32, 42,915.75 and 19,788.40

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Solution

The fourth proportional to 28,616.32, 42,915.75 and 19,788.40 is: 29,676.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,616.32 : 42,915.75 = 19,788.40 : x
  2. Step 2: Convert to fraction form
    28,616.32/42,915.75 = 19,788.40/x
  3. Step 3: Cross multiply
    28,616.32x = 42,915.75 × 19,788.40
  4. Step 4: Simplify right side
    28,616.32x = 849,234,027.30
  5. Step 5: Solve for x
    x = 849,234,027.30/28,616.32
  6. Step 6: Final answer
    x = 29,676.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.