Home / 31,099.10-42,882.86-21,010.02

Finding the Fourth Proportional to 31,099.10, 42,882.86 and 21,010.02

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Solution

The fourth proportional to 31,099.10, 42,882.86 and 21,010.02 is: 28,970.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,099.10 : 42,882.86 = 21,010.02 : x
  2. Step 2: Convert to fraction form
    31,099.10/42,882.86 = 21,010.02/x
  3. Step 3: Cross multiply
    31,099.10x = 42,882.86 × 21,010.02
  4. Step 4: Simplify right side
    31,099.10x = 900,969,746.26
  5. Step 5: Solve for x
    x = 900,969,746.26/31,099.10
  6. Step 6: Final answer
    x = 28,970.93

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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.