Home / 30,999.86-42,707.48-21,552.02

Finding the Fourth Proportional to 30,999.86, 42,707.48 and 21,552.02

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Solution

The fourth proportional to 30,999.86, 42,707.48 and 21,552.02 is: 29,691.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,999.86 : 42,707.48 = 21,552.02 : x
  2. Step 2: Convert to fraction form
    30,999.86/42,707.48 = 21,552.02/x
  3. Step 3: Cross multiply
    30,999.86x = 42,707.48 × 21,552.02
  4. Step 4: Simplify right side
    30,999.86x = 920,432,463.11
  5. Step 5: Solve for x
    x = 920,432,463.11/30,999.86
  6. Step 6: Final answer
    x = 29,691.50

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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.