Home / 31,342.65-43,264.90-21,275.60

Finding the Fourth Proportional to 31,342.65, 43,264.90 and 21,275.60

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Solution

The fourth proportional to 31,342.65, 43,264.90 and 21,275.60 is: 29,368.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,342.65 : 43,264.90 = 21,275.60 : x
  2. Step 2: Convert to fraction form
    31,342.65/43,264.90 = 21,275.60/x
  3. Step 3: Cross multiply
    31,342.65x = 43,264.90 × 21,275.60
  4. Step 4: Simplify right side
    31,342.65x = 920,486,516.71
  5. Step 5: Solve for x
    x = 920,486,516.71/31,342.65
  6. Step 6: Final answer
    x = 29,368.50

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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.