Home / 15,342.45-21,172.95-8,536.56

Finding the Fourth Proportional to 15,342.45, 21,172.95 and 8,536.56

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Solution

The fourth proportional to 15,342.45, 21,172.95 and 8,536.56 is: 11,780.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,342.45 : 21,172.95 = 8,536.56 : x
  2. Step 2: Convert to fraction form
    15,342.45/21,172.95 = 8,536.56/x
  3. Step 3: Cross multiply
    15,342.45x = 21,172.95 × 8,536.56
  4. Step 4: Simplify right side
    15,342.45x = 180,744,158.05
  5. Step 5: Solve for x
    x = 180,744,158.05/15,342.45
  6. Step 6: Final answer
    x = 11,780.66

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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.