Home / 30,744.08-42,430.02-18,815.36

Finding the Fourth Proportional to 30,744.08, 42,430.02 and 18,815.36

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Solution

The fourth proportional to 30,744.08, 42,430.02 and 18,815.36 is: 25,967.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,744.08 : 42,430.02 = 18,815.36 : x
  2. Step 2: Convert to fraction form
    30,744.08/42,430.02 = 18,815.36/x
  3. Step 3: Cross multiply
    30,744.08x = 42,430.02 × 18,815.36
  4. Step 4: Simplify right side
    30,744.08x = 798,336,101.11
  5. Step 5: Solve for x
    x = 798,336,101.11/30,744.08
  6. Step 6: Final answer
    x = 25,967.15

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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.