Home / 30,689.47-42,336.46-18,732.05

Finding the Fourth Proportional to 30,689.47, 42,336.46 and 18,732.05

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Solution

The fourth proportional to 30,689.47, 42,336.46 and 18,732.05 is: 25,841.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,689.47 : 42,336.46 = 18,732.05 : x
  2. Step 2: Convert to fraction form
    30,689.47/42,336.46 = 18,732.05/x
  3. Step 3: Cross multiply
    30,689.47x = 42,336.46 × 18,732.05
  4. Step 4: Simplify right side
    30,689.47x = 793,048,685.54
  5. Step 5: Solve for x
    x = 793,048,685.54/30,689.47
  6. Step 6: Final answer
    x = 25,841.07

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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.