Home / 15,643.88-21,589.08-8,570.70

Finding the Fourth Proportional to 15,643.88, 21,589.08 and 8,570.70

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Solution

The fourth proportional to 15,643.88, 21,589.08 and 8,570.70 is: 11,827.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,643.88 : 21,589.08 = 8,570.70 : x
  2. Step 2: Convert to fraction form
    15,643.88/21,589.08 = 8,570.70/x
  3. Step 3: Cross multiply
    15,643.88x = 21,589.08 × 8,570.70
  4. Step 4: Simplify right side
    15,643.88x = 185,033,527.96
  5. Step 5: Solve for x
    x = 185,033,527.96/15,643.88
  6. Step 6: Final answer
    x = 11,827.85

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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.