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Finding the Fourth Proportional to 15,887.80, 21,926.51 and 8,816.50

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Solution

The fourth proportional to 15,887.80, 21,926.51 and 8,816.50 is: 12,167.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,887.80 : 21,926.51 = 8,816.50 : x
  2. Step 2: Convert to fraction form
    15,887.80/21,926.51 = 8,816.50/x
  3. Step 3: Cross multiply
    15,887.80x = 21,926.51 × 8,816.50
  4. Step 4: Simplify right side
    15,887.80x = 193,315,075.42
  5. Step 5: Solve for x
    x = 193,315,075.42/15,887.80
  6. Step 6: Final answer
    x = 12,167.52

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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.