Home / 21,162.80-31,715.40-14,999.60

Finding the Fourth Proportional to 21,162.80, 31,715.40 and 14,999.60

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Solution

The fourth proportional to 21,162.80, 31,715.40 and 14,999.60 is: 22,478.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,162.80 : 31,715.40 = 14,999.60 : x
  2. Step 2: Convert to fraction form
    21,162.80/31,715.40 = 14,999.60/x
  3. Step 3: Cross multiply
    21,162.80x = 31,715.40 × 14,999.60
  4. Step 4: Simplify right side
    21,162.80x = 475,718,313.84
  5. Step 5: Solve for x
    x = 475,718,313.84/21,162.80
  6. Step 6: Final answer
    x = 22,478.99

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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.