Home / 12,521.78-18,783.28-10,326.50

Finding the Fourth Proportional to 12,521.78, 18,783.28 and 10,326.50

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Solution

The fourth proportional to 12,521.78, 18,783.28 and 10,326.50 is: 15,490.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,521.78 : 18,783.28 = 10,326.50 : x
  2. Step 2: Convert to fraction form
    12,521.78/18,783.28 = 10,326.50/x
  3. Step 3: Cross multiply
    12,521.78x = 18,783.28 × 10,326.50
  4. Step 4: Simplify right side
    12,521.78x = 193,965,515.10
  5. Step 5: Solve for x
    x = 193,965,515.10/12,521.78
  6. Step 6: Final answer
    x = 15,490.25

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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.