Home / 21,018.76-29,005.50-11,458.74

Finding the Fourth Proportional to 21,018.76, 29,005.50 and 11,458.74

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Solution

The fourth proportional to 21,018.76, 29,005.50 and 11,458.74 is: 15,812.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.76 : 29,005.50 = 11,458.74 : x
  2. Step 2: Convert to fraction form
    21,018.76/29,005.50 = 11,458.74/x
  3. Step 3: Cross multiply
    21,018.76x = 29,005.50 × 11,458.74
  4. Step 4: Simplify right side
    21,018.76x = 332,366,483.07
  5. Step 5: Solve for x
    x = 332,366,483.07/21,018.76
  6. Step 6: Final answer
    x = 15,812.85

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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.