Home / 15,870.80-21,901.83-8,797.22

Finding the Fourth Proportional to 15,870.80, 21,901.83 and 8,797.22

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Solution

The fourth proportional to 15,870.80, 21,901.83 and 8,797.22 is: 12,140.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.80 : 21,901.83 = 8,797.22 : x
  2. Step 2: Convert to fraction form
    15,870.80/21,901.83 = 8,797.22/x
  3. Step 3: Cross multiply
    15,870.80x = 21,901.83 × 8,797.22
  4. Step 4: Simplify right side
    15,870.80x = 192,675,156.55
  5. Step 5: Solve for x
    x = 192,675,156.55/15,870.80
  6. Step 6: Final answer
    x = 12,140.23

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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.