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Finding the Fourth Proportional to 15,368.82, 21,211 and 8,655.77

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Solution

The fourth proportional to 15,368.82, 21,211 and 8,655.77 is: 11,946.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,368.82 : 21,211 = 8,655.77 : x
  2. Step 2: Convert to fraction form
    15,368.82/21,211 = 8,655.77/x
  3. Step 3: Cross multiply
    15,368.82x = 21,211 × 8,655.77
  4. Step 4: Simplify right side
    15,368.82x = 183,597,537.47
  5. Step 5: Solve for x
    x = 183,597,537.47/15,368.82
  6. Step 6: Final answer
    x = 11,946.11

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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.