Home / 30,646.20-42,284.16-18,705.18

Finding the Fourth Proportional to 30,646.20, 42,284.16 and 18,705.18

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Solution

The fourth proportional to 30,646.20, 42,284.16 and 18,705.18 is: 25,808.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,646.20 : 42,284.16 = 18,705.18 : x
  2. Step 2: Convert to fraction form
    30,646.20/42,284.16 = 18,705.18/x
  3. Step 3: Cross multiply
    30,646.20x = 42,284.16 × 18,705.18
  4. Step 4: Simplify right side
    30,646.20x = 790,932,823.95
  5. Step 5: Solve for x
    x = 790,932,823.95/30,646.20
  6. Step 6: Final answer
    x = 25,808.51

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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.