Home / 15,816.21-21,828.54-9,101.70

Finding the Fourth Proportional to 15,816.21, 21,828.54 and 9,101.70

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Solution

The fourth proportional to 15,816.21, 21,828.54 and 9,101.70 is: 12,561.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,816.21 : 21,828.54 = 9,101.70 : x
  2. Step 2: Convert to fraction form
    15,816.21/21,828.54 = 9,101.70/x
  3. Step 3: Cross multiply
    15,816.21x = 21,828.54 × 9,101.70
  4. Step 4: Simplify right side
    15,816.21x = 198,676,822.52
  5. Step 5: Solve for x
    x = 198,676,822.52/15,816.21
  6. Step 6: Final answer
    x = 12,561.59

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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.