Home / 28,010.72-42,001.52-13,215.68

Finding the Fourth Proportional to 28,010.72, 42,001.52 and 13,215.68

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Solution

The fourth proportional to 28,010.72, 42,001.52 and 13,215.68 is: 19,816.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,010.72 : 42,001.52 = 13,215.68 : x
  2. Step 2: Convert to fraction form
    28,010.72/42,001.52 = 13,215.68/x
  3. Step 3: Cross multiply
    28,010.72x = 42,001.52 × 13,215.68
  4. Step 4: Simplify right side
    28,010.72x = 555,078,647.83
  5. Step 5: Solve for x
    x = 555,078,647.83/28,010.72
  6. Step 6: Final answer
    x = 19,816.65

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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.