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Finding the Fourth Proportional to 15,533.77, 21,437.14 and 8,819.18

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Solution

The fourth proportional to 15,533.77, 21,437.14 and 8,819.18 is: 12,170.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,533.77 : 21,437.14 = 8,819.18 : x
  2. Step 2: Convert to fraction form
    15,533.77/21,437.14 = 8,819.18/x
  3. Step 3: Cross multiply
    15,533.77x = 21,437.14 × 8,819.18
  4. Step 4: Simplify right side
    15,533.77x = 189,057,889.16
  5. Step 5: Solve for x
    x = 189,057,889.16/15,533.77
  6. Step 6: Final answer
    x = 12,170.77

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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.