Home / 30,636.80-42,283.36-18,707.04

Finding the Fourth Proportional to 30,636.80, 42,283.36 and 18,707.04

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Solution

The fourth proportional to 30,636.80, 42,283.36 and 18,707.04 is: 25,818.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,636.80 : 42,283.36 = 18,707.04 : x
  2. Step 2: Convert to fraction form
    30,636.80/42,283.36 = 18,707.04/x
  3. Step 3: Cross multiply
    30,636.80x = 42,283.36 × 18,707.04
  4. Step 4: Simplify right side
    30,636.80x = 790,996,506.85
  5. Step 5: Solve for x
    x = 790,996,506.85/30,636.80
  6. Step 6: Final answer
    x = 25,818.51

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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.