Home / 31,291.04-43,187.16-18,715.76

Finding the Fourth Proportional to 31,291.04, 43,187.16 and 18,715.76

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Solution

The fourth proportional to 31,291.04, 43,187.16 and 18,715.76 is: 25,831.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,291.04 : 43,187.16 = 18,715.76 : x
  2. Step 2: Convert to fraction form
    31,291.04/43,187.16 = 18,715.76/x
  3. Step 3: Cross multiply
    31,291.04x = 43,187.16 × 18,715.76
  4. Step 4: Simplify right side
    31,291.04x = 808,280,521.64
  5. Step 5: Solve for x
    x = 808,280,521.64/31,291.04
  6. Step 6: Final answer
    x = 25,831.05

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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.