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Finding the Fourth Proportional to 12,888.51, 19,315.49 and 10,607.55

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Solution

The fourth proportional to 12,888.51, 19,315.49 and 10,607.55 is: 15,897.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.51 : 19,315.49 = 10,607.55 : x
  2. Step 2: Convert to fraction form
    12,888.51/19,315.49 = 10,607.55/x
  3. Step 3: Cross multiply
    12,888.51x = 19,315.49 × 10,607.55
  4. Step 4: Simplify right side
    12,888.51x = 204,889,972.91
  5. Step 5: Solve for x
    x = 204,889,972.91/12,888.51
  6. Step 6: Final answer
    x = 15,897.10

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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.