Home / 21,312.76-31,945.82-8,159.40

Finding the Fourth Proportional to 21,312.76, 31,945.82 and 8,159.40

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Solution

The fourth proportional to 21,312.76, 31,945.82 and 8,159.40 is: 12,230.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.76 : 31,945.82 = 8,159.40 : x
  2. Step 2: Convert to fraction form
    21,312.76/31,945.82 = 8,159.40/x
  3. Step 3: Cross multiply
    21,312.76x = 31,945.82 × 8,159.40
  4. Step 4: Simplify right side
    21,312.76x = 260,658,723.71
  5. Step 5: Solve for x
    x = 260,658,723.71/21,312.76
  6. Step 6: Final answer
    x = 12,230.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.