Home / 31,013.22-42,783.21-18,429.06

Finding the Fourth Proportional to 31,013.22, 42,783.21 and 18,429.06

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Solution

The fourth proportional to 31,013.22, 42,783.21 and 18,429.06 is: 25,423.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,013.22 : 42,783.21 = 18,429.06 : x
  2. Step 2: Convert to fraction form
    31,013.22/42,783.21 = 18,429.06/x
  3. Step 3: Cross multiply
    31,013.22x = 42,783.21 × 18,429.06
  4. Step 4: Simplify right side
    31,013.22x = 788,454,344.08
  5. Step 5: Solve for x
    x = 788,454,344.08/31,013.22
  6. Step 6: Final answer
    x = 25,423.17

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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.