Home / 20,705.65-31,058.75-5,915.05

Finding the Fourth Proportional to 20,705.65, 31,058.75 and 5,915.05

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Solution

The fourth proportional to 20,705.65, 31,058.75 and 5,915.05 is: 8,872.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.65 : 31,058.75 = 5,915.05 : x
  2. Step 2: Convert to fraction form
    20,705.65/31,058.75 = 5,915.05/x
  3. Step 3: Cross multiply
    20,705.65x = 31,058.75 × 5,915.05
  4. Step 4: Simplify right side
    20,705.65x = 183,714,029.61
  5. Step 5: Solve for x
    x = 183,714,029.61/20,705.65
  6. Step 6: Final answer
    x = 8,872.65

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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.