Home / 30,117.31-45,150.49-18,999.55

Finding the Fourth Proportional to 30,117.31, 45,150.49 and 18,999.55

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Solution

The fourth proportional to 30,117.31, 45,150.49 and 18,999.55 is: 28,483.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,117.31 : 45,150.49 = 18,999.55 : x
  2. Step 2: Convert to fraction form
    30,117.31/45,150.49 = 18,999.55/x
  3. Step 3: Cross multiply
    30,117.31x = 45,150.49 × 18,999.55
  4. Step 4: Simplify right side
    30,117.31x = 857,838,992.28
  5. Step 5: Solve for x
    x = 857,838,992.28/30,117.31
  6. Step 6: Final answer
    x = 28,483.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.