Home / 30,646.70-42,277.44-18,689.28

Finding the Fourth Proportional to 30,646.70, 42,277.44 and 18,689.28

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Solution

The fourth proportional to 30,646.70, 42,277.44 and 18,689.28 is: 25,782.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,646.70 : 42,277.44 = 18,689.28 : x
  2. Step 2: Convert to fraction form
    30,646.70/42,277.44 = 18,689.28/x
  3. Step 3: Cross multiply
    30,646.70x = 42,277.44 × 18,689.28
  4. Step 4: Simplify right side
    30,646.70x = 790,135,063.20
  5. Step 5: Solve for x
    x = 790,135,063.20/30,646.70
  6. Step 6: Final answer
    x = 25,782.06

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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.