Home / 31,080.12-42,898.86-19,145.40

Finding the Fourth Proportional to 31,080.12, 42,898.86 and 19,145.40

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Solution

The fourth proportional to 31,080.12, 42,898.86 and 19,145.40 is: 26,425.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,080.12 : 42,898.86 = 19,145.40 : x
  2. Step 2: Convert to fraction form
    31,080.12/42,898.86 = 19,145.40/x
  3. Step 3: Cross multiply
    31,080.12x = 42,898.86 × 19,145.40
  4. Step 4: Simplify right side
    31,080.12x = 821,315,834.24
  5. Step 5: Solve for x
    x = 821,315,834.24/31,080.12
  6. Step 6: Final answer
    x = 26,425.76

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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.