Home / 15,389.91-21,238.09-8,316.35

Finding the Fourth Proportional to 15,389.91, 21,238.09 and 8,316.35

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Solution

The fourth proportional to 15,389.91, 21,238.09 and 8,316.35 is: 11,476.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.91 : 21,238.09 = 8,316.35 : x
  2. Step 2: Convert to fraction form
    15,389.91/21,238.09 = 8,316.35/x
  3. Step 3: Cross multiply
    15,389.91x = 21,238.09 × 8,316.35
  4. Step 4: Simplify right side
    15,389.91x = 176,623,389.77
  5. Step 5: Solve for x
    x = 176,623,389.77/15,389.91
  6. Step 6: Final answer
    x = 11,476.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.