Home / 31,376.08-43,275-21,312.28

Finding the Fourth Proportional to 31,376.08, 43,275 and 21,312.28

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Solution

The fourth proportional to 31,376.08, 43,275 and 21,312.28 is: 29,394.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,376.08 : 43,275 = 21,312.28 : x
  2. Step 2: Convert to fraction form
    31,376.08/43,275 = 21,312.28/x
  3. Step 3: Cross multiply
    31,376.08x = 43,275 × 21,312.28
  4. Step 4: Simplify right side
    31,376.08x = 922,288,917
  5. Step 5: Solve for x
    x = 922,288,917/31,376.08
  6. Step 6: Final answer
    x = 29,394.65

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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.