Home / 31,478.16-43,462.08-20,889.84

Finding the Fourth Proportional to 31,478.16, 43,462.08 and 20,889.84

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Solution

The fourth proportional to 31,478.16, 43,462.08 and 20,889.84 is: 28,842.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,478.16 : 43,462.08 = 20,889.84 : x
  2. Step 2: Convert to fraction form
    31,478.16/43,462.08 = 20,889.84/x
  3. Step 3: Cross multiply
    31,478.16x = 43,462.08 × 20,889.84
  4. Step 4: Simplify right side
    31,478.16x = 907,915,897.27
  5. Step 5: Solve for x
    x = 907,915,897.27/31,478.16
  6. Step 6: Final answer
    x = 28,842.72

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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.