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Finding the Fourth Proportional to 28,010, 38,653.80 and 15,435.92

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Solution

The fourth proportional to 28,010, 38,653.80 and 15,435.92 is: 21,301.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,010 : 38,653.80 = 15,435.92 : x
  2. Step 2: Convert to fraction form
    28,010/38,653.80 = 15,435.92/x
  3. Step 3: Cross multiply
    28,010x = 38,653.80 × 15,435.92
  4. Step 4: Simplify right side
    28,010x = 596,656,964.50
  5. Step 5: Solve for x
    x = 596,656,964.50/28,010
  6. Step 6: Final answer
    x = 21,301.57

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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.