Home / 15,475.84-21,356.88-8,402.56

Finding the Fourth Proportional to 15,475.84, 21,356.88 and 8,402.56

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Solution

The fourth proportional to 15,475.84, 21,356.88 and 8,402.56 is: 11,595.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,475.84 : 21,356.88 = 8,402.56 : x
  2. Step 2: Convert to fraction form
    15,475.84/21,356.88 = 8,402.56/x
  3. Step 3: Cross multiply
    15,475.84x = 21,356.88 × 8,402.56
  4. Step 4: Simplify right side
    15,475.84x = 179,452,465.61
  5. Step 5: Solve for x
    x = 179,452,465.61/15,475.84
  6. Step 6: Final answer
    x = 11,595.65

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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.