Home / 28,058.74-42,009.54-21,138.10

Finding the Fourth Proportional to 28,058.74, 42,009.54 and 21,138.10

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Solution

The fourth proportional to 28,058.74, 42,009.54 and 21,138.10 is: 31,647.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,058.74 : 42,009.54 = 21,138.10 : x
  2. Step 2: Convert to fraction form
    28,058.74/42,009.54 = 21,138.10/x
  3. Step 3: Cross multiply
    28,058.74x = 42,009.54 × 21,138.10
  4. Step 4: Simplify right side
    28,058.74x = 888,001,857.47
  5. Step 5: Solve for x
    x = 888,001,857.47/28,058.74
  6. Step 6: Final answer
    x = 31,647.96

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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.