Home / 13,215.71-19,810.13-8,288.78

Finding the Fourth Proportional to 13,215.71, 19,810.13 and 8,288.78

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Solution

The fourth proportional to 13,215.71, 19,810.13 and 8,288.78 is: 12,424.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.71 : 19,810.13 = 8,288.78 : x
  2. Step 2: Convert to fraction form
    13,215.71/19,810.13 = 8,288.78/x
  3. Step 3: Cross multiply
    13,215.71x = 19,810.13 × 8,288.78
  4. Step 4: Simplify right side
    13,215.71x = 164,201,809.34
  5. Step 5: Solve for x
    x = 164,201,809.34/13,215.71
  6. Step 6: Final answer
    x = 12,424.74

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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.