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Finding the Fourth Proportional to 12,913.58, 19,359.03 and 8,521.76

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Solution

The fourth proportional to 12,913.58, 19,359.03 and 8,521.76 is: 12,775.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,913.58 : 19,359.03 = 8,521.76 : x
  2. Step 2: Convert to fraction form
    12,913.58/19,359.03 = 8,521.76/x
  3. Step 3: Cross multiply
    12,913.58x = 19,359.03 × 8,521.76
  4. Step 4: Simplify right side
    12,913.58x = 164,973,007.49
  5. Step 5: Solve for x
    x = 164,973,007.49/12,913.58
  6. Step 6: Final answer
    x = 12,775.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.