Home / 31,345.65-43,232.85-21,785.45

Finding the Fourth Proportional to 31,345.65, 43,232.85 and 21,785.45

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Solution

The fourth proportional to 31,345.65, 43,232.85 and 21,785.45 is: 30,047.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,345.65 : 43,232.85 = 21,785.45 : x
  2. Step 2: Convert to fraction form
    31,345.65/43,232.85 = 21,785.45/x
  3. Step 3: Cross multiply
    31,345.65x = 43,232.85 × 21,785.45
  4. Step 4: Simplify right side
    31,345.65x = 941,846,875.87
  5. Step 5: Solve for x
    x = 941,846,875.87/31,345.65
  6. Step 6: Final answer
    x = 30,047.13

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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.