Home / 31,642.13-43,647.05-20,887.05

Finding the Fourth Proportional to 31,642.13, 43,647.05 and 20,887.05

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Solution

The fourth proportional to 31,642.13, 43,647.05 and 20,887.05 is: 28,811.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,642.13 : 43,647.05 = 20,887.05 : x
  2. Step 2: Convert to fraction form
    31,642.13/43,647.05 = 20,887.05/x
  3. Step 3: Cross multiply
    31,642.13x = 43,647.05 × 20,887.05
  4. Step 4: Simplify right side
    31,642.13x = 911,657,994.01
  5. Step 5: Solve for x
    x = 911,657,994.01/31,642.13
  6. Step 6: Final answer
    x = 28,811.52

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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.