Home / 15,316.70-21,131.89-8,600.99

Finding the Fourth Proportional to 15,316.70, 21,131.89 and 8,600.99

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Solution

The fourth proportional to 15,316.70, 21,131.89 and 8,600.99 is: 11,866.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,316.70 : 21,131.89 = 8,600.99 : x
  2. Step 2: Convert to fraction form
    15,316.70/21,131.89 = 8,600.99/x
  3. Step 3: Cross multiply
    15,316.70x = 21,131.89 × 8,600.99
  4. Step 4: Simplify right side
    15,316.70x = 181,755,047.41
  5. Step 5: Solve for x
    x = 181,755,047.41/15,316.70
  6. Step 6: Final answer
    x = 11,866.47

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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.