Home / 15,847.75-21,870.10-8,774.16

Finding the Fourth Proportional to 15,847.75, 21,870.10 and 8,774.16

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Solution

The fourth proportional to 15,847.75, 21,870.10 and 8,774.16 is: 12,108.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,847.75 : 21,870.10 = 8,774.16 : x
  2. Step 2: Convert to fraction form
    15,847.75/21,870.10 = 8,774.16/x
  3. Step 3: Cross multiply
    15,847.75x = 21,870.10 × 8,774.16
  4. Step 4: Simplify right side
    15,847.75x = 191,891,685.57
  5. Step 5: Solve for x
    x = 191,891,685.57/15,847.75
  6. Step 6: Final answer
    x = 12,108.45

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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.