Home / 28,020.48-42,030.36-9,309.12

Finding the Fourth Proportional to 28,020.48, 42,030.36 and 9,309.12

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Solution

The fourth proportional to 28,020.48, 42,030.36 and 9,309.12 is: 13,963.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,020.48 : 42,030.36 = 9,309.12 : x
  2. Step 2: Convert to fraction form
    28,020.48/42,030.36 = 9,309.12/x
  3. Step 3: Cross multiply
    28,020.48x = 42,030.36 × 9,309.12
  4. Step 4: Simplify right side
    28,020.48x = 391,265,664.88
  5. Step 5: Solve for x
    x = 391,265,664.88/28,020.48
  6. Step 6: Final answer
    x = 13,963.56

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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.