Home / 21,370.12-29,490.60-11,810.65

Finding the Fourth Proportional to 21,370.12, 29,490.60 and 11,810.65

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Solution

The fourth proportional to 21,370.12, 29,490.60 and 11,810.65 is: 16,298.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.12 : 29,490.60 = 11,810.65 : x
  2. Step 2: Convert to fraction form
    21,370.12/29,490.60 = 11,810.65/x
  3. Step 3: Cross multiply
    21,370.12x = 29,490.60 × 11,810.65
  4. Step 4: Simplify right side
    21,370.12x = 348,303,154.89
  5. Step 5: Solve for x
    x = 348,303,154.89/21,370.12
  6. Step 6: Final answer
    x = 16,298.61

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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.