Home / 15,317.78-21,132.18-8,941.21

Finding the Fourth Proportional to 15,317.78, 21,132.18 and 8,941.21

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Solution

The fourth proportional to 15,317.78, 21,132.18 and 8,941.21 is: 12,335.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,317.78 : 21,132.18 = 8,941.21 : x
  2. Step 2: Convert to fraction form
    15,317.78/21,132.18 = 8,941.21/x
  3. Step 3: Cross multiply
    15,317.78x = 21,132.18 × 8,941.21
  4. Step 4: Simplify right side
    15,317.78x = 188,947,206.31
  5. Step 5: Solve for x
    x = 188,947,206.31/15,317.78
  6. Step 6: Final answer
    x = 12,335.16

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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.