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Finding the Fourth Proportional to 15,552, 21,461.76 and 9,963

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Solution

The fourth proportional to 15,552, 21,461.76 and 9,963 is: 13,748.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,552 : 21,461.76 = 9,963 : x
  2. Step 2: Convert to fraction form
    15,552/21,461.76 = 9,963/x
  3. Step 3: Cross multiply
    15,552x = 21,461.76 × 9,963
  4. Step 4: Simplify right side
    15,552x = 213,823,514.88
  5. Step 5: Solve for x
    x = 213,823,514.88/15,552
  6. Step 6: Final answer
    x = 13,748.94

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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.