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Finding the Fourth Proportional to 15,653.90, 21,602.33 and 8,484.03

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Solution

The fourth proportional to 15,653.90, 21,602.33 and 8,484.03 is: 11,707.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,653.90 : 21,602.33 = 8,484.03 : x
  2. Step 2: Convert to fraction form
    15,653.90/21,602.33 = 8,484.03/x
  3. Step 3: Cross multiply
    15,653.90x = 21,602.33 × 8,484.03
  4. Step 4: Simplify right side
    15,653.90x = 183,274,707.78
  5. Step 5: Solve for x
    x = 183,274,707.78/15,653.90
  6. Step 6: Final answer
    x = 11,707.93

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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.