Home / 15,811.65-21,821.13-10,502.91

Finding the Fourth Proportional to 15,811.65, 21,821.13 and 10,502.91

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Solution

The fourth proportional to 15,811.65, 21,821.13 and 10,502.91 is: 14,494.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.65 : 21,821.13 = 10,502.91 : x
  2. Step 2: Convert to fraction form
    15,811.65/21,821.13 = 10,502.91/x
  3. Step 3: Cross multiply
    15,811.65x = 21,821.13 × 10,502.91
  4. Step 4: Simplify right side
    15,811.65x = 229,185,364.49
  5. Step 5: Solve for x
    x = 229,185,364.49/15,811.65
  6. Step 6: Final answer
    x = 14,494.72

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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.