Home / 21,303.30-31,953.84-8,154.66

Finding the Fourth Proportional to 21,303.30, 31,953.84 and 8,154.66

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Solution

The fourth proportional to 21,303.30, 31,953.84 and 8,154.66 is: 12,231.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303.30 : 31,953.84 = 8,154.66 : x
  2. Step 2: Convert to fraction form
    21,303.30/31,953.84 = 8,154.66/x
  3. Step 3: Cross multiply
    21,303.30x = 31,953.84 × 8,154.66
  4. Step 4: Simplify right side
    21,303.30x = 260,572,700.89
  5. Step 5: Solve for x
    x = 260,572,700.89/21,303.30
  6. Step 6: Final answer
    x = 12,231.57

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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.