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Finding the Fourth Proportional to 12,808.71, 19,215.68 and 7,264.53

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Solution

The fourth proportional to 12,808.71, 19,215.68 and 7,264.53 is: 10,898.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,808.71 : 19,215.68 = 7,264.53 : x
  2. Step 2: Convert to fraction form
    12,808.71/19,215.68 = 7,264.53/x
  3. Step 3: Cross multiply
    12,808.71x = 19,215.68 × 7,264.53
  4. Step 4: Simplify right side
    12,808.71x = 139,592,847.51
  5. Step 5: Solve for x
    x = 139,592,847.51/12,808.71
  6. Step 6: Final answer
    x = 10,898.28

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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.