Home / 15,716.16-21,685.50-9,428.64

Finding the Fourth Proportional to 15,716.16, 21,685.50 and 9,428.64

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Solution

The fourth proportional to 15,716.16, 21,685.50 and 9,428.64 is: 13,009.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,716.16 : 21,685.50 = 9,428.64 : x
  2. Step 2: Convert to fraction form
    15,716.16/21,685.50 = 9,428.64/x
  3. Step 3: Cross multiply
    15,716.16x = 21,685.50 × 9,428.64
  4. Step 4: Simplify right side
    15,716.16x = 204,464,772.72
  5. Step 5: Solve for x
    x = 204,464,772.72/15,716.16
  6. Step 6: Final answer
    x = 13,009.84

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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.