Home / 31,085.16-42,846.28-21,998.80

Finding the Fourth Proportional to 31,085.16, 42,846.28 and 21,998.80

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Solution

The fourth proportional to 31,085.16, 42,846.28 and 21,998.80 is: 30,322.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,085.16 : 42,846.28 = 21,998.80 : x
  2. Step 2: Convert to fraction form
    31,085.16/42,846.28 = 21,998.80/x
  3. Step 3: Cross multiply
    31,085.16x = 42,846.28 × 21,998.80
  4. Step 4: Simplify right side
    31,085.16x = 942,566,744.46
  5. Step 5: Solve for x
    x = 942,566,744.46/31,085.16
  6. Step 6: Final answer
    x = 30,322.08

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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.