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Finding the Fourth Proportional to 15,870.84, 21,899.46 and 8,797.26

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Solution

The fourth proportional to 15,870.84, 21,899.46 and 8,797.26 is: 12,138.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.84 : 21,899.46 = 8,797.26 : x
  2. Step 2: Convert to fraction form
    15,870.84/21,899.46 = 8,797.26/x
  3. Step 3: Cross multiply
    15,870.84x = 21,899.46 × 8,797.26
  4. Step 4: Simplify right side
    15,870.84x = 192,655,243.48
  5. Step 5: Solve for x
    x = 192,655,243.48/15,870.84
  6. Step 6: Final answer
    x = 12,138.94

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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.