Home / 31,387.80-43,313.22-28,880.04

Finding the Fourth Proportional to 31,387.80, 43,313.22 and 28,880.04

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Solution

The fourth proportional to 31,387.80, 43,313.22 and 28,880.04 is: 39,852.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,387.80 : 43,313.22 = 28,880.04 : x
  2. Step 2: Convert to fraction form
    31,387.80/43,313.22 = 28,880.04/x
  3. Step 3: Cross multiply
    31,387.80x = 43,313.22 × 28,880.04
  4. Step 4: Simplify right side
    31,387.80x = 1,250,887,526.13
  5. Step 5: Solve for x
    x = 1,250,887,526.13/31,387.80
  6. Step 6: Final answer
    x = 39,852.67

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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.