Home / 21,359.66-29,490.19-19,117.65

Finding the Fourth Proportional to 21,359.66, 29,490.19 and 19,117.65

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Solution

The fourth proportional to 21,359.66, 29,490.19 and 19,117.65 is: 26,394.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,359.66 : 29,490.19 = 19,117.65 : x
  2. Step 2: Convert to fraction form
    21,359.66/29,490.19 = 19,117.65/x
  3. Step 3: Cross multiply
    21,359.66x = 29,490.19 × 19,117.65
  4. Step 4: Simplify right side
    21,359.66x = 563,783,130.85
  5. Step 5: Solve for x
    x = 563,783,130.85/21,359.66
  6. Step 6: Final answer
    x = 26,394.76

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Half scale
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Double scale
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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.