Home / 31,630.19-43,632.39-20,287.07

Finding the Fourth Proportional to 31,630.19, 43,632.39 and 20,287.07

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Solution

The fourth proportional to 31,630.19, 43,632.39 and 20,287.07 is: 27,985.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,630.19 : 43,632.39 = 20,287.07 : x
  2. Step 2: Convert to fraction form
    31,630.19/43,632.39 = 20,287.07/x
  3. Step 3: Cross multiply
    31,630.19x = 43,632.39 × 20,287.07
  4. Step 4: Simplify right side
    31,630.19x = 885,173,459.28
  5. Step 5: Solve for x
    x = 885,173,459.28/31,630.19
  6. Step 6: Final answer
    x = 27,985.08

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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.