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Finding the Fourth Proportional to 28,009.88, 38,653.12 and 15,263.17

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Solution

The fourth proportional to 28,009.88, 38,653.12 and 15,263.17 is: 21,062.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.88 : 38,653.12 = 15,263.17 : x
  2. Step 2: Convert to fraction form
    28,009.88/38,653.12 = 15,263.17/x
  3. Step 3: Cross multiply
    28,009.88x = 38,653.12 × 15,263.17
  4. Step 4: Simplify right side
    28,009.88x = 589,968,948.32
  5. Step 5: Solve for x
    x = 589,968,948.32/28,009.88
  6. Step 6: Final answer
    x = 21,062.89

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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.