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Finding the Fourth Proportional to 15,495.78, 21,384.73 and 8,597.12

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Solution

The fourth proportional to 15,495.78, 21,384.73 and 8,597.12 is: 11,864.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.78 : 21,384.73 = 8,597.12 : x
  2. Step 2: Convert to fraction form
    15,495.78/21,384.73 = 8,597.12/x
  3. Step 3: Cross multiply
    15,495.78x = 21,384.73 × 8,597.12
  4. Step 4: Simplify right side
    15,495.78x = 183,847,089.98
  5. Step 5: Solve for x
    x = 183,847,089.98/15,495.78
  6. Step 6: Final answer
    x = 11,864.34

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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.