Home / 31,853.04-43,921.76-21,783.12

Finding the Fourth Proportional to 31,853.04, 43,921.76 and 21,783.12

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Solution

The fourth proportional to 31,853.04, 43,921.76 and 21,783.12 is: 30,036.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,853.04 : 43,921.76 = 21,783.12 : x
  2. Step 2: Convert to fraction form
    31,853.04/43,921.76 = 21,783.12/x
  3. Step 3: Cross multiply
    31,853.04x = 43,921.76 × 21,783.12
  4. Step 4: Simplify right side
    31,853.04x = 956,752,968.69
  5. Step 5: Solve for x
    x = 956,752,968.69/31,853.04
  6. Step 6: Final answer
    x = 30,036.47

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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.