Home / 28,215.12-42,322.99-11,563.55

Finding the Fourth Proportional to 28,215.12, 42,322.99 and 11,563.55

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Solution

The fourth proportional to 28,215.12, 42,322.99 and 11,563.55 is: 17,345.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.12 : 42,322.99 = 11,563.55 : x
  2. Step 2: Convert to fraction form
    28,215.12/42,322.99 = 11,563.55/x
  3. Step 3: Cross multiply
    28,215.12x = 42,322.99 × 11,563.55
  4. Step 4: Simplify right side
    28,215.12x = 489,404,011.01
  5. Step 5: Solve for x
    x = 489,404,011.01/28,215.12
  6. Step 6: Final answer
    x = 17,345.45

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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.