Home / 28,964.16-39,970.40-15,716.16

Finding the Fourth Proportional to 28,964.16, 39,970.40 and 15,716.16

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Solution

The fourth proportional to 28,964.16, 39,970.40 and 15,716.16 is: 21,688.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,964.16 : 39,970.40 = 15,716.16 : x
  2. Step 2: Convert to fraction form
    28,964.16/39,970.40 = 15,716.16/x
  3. Step 3: Cross multiply
    28,964.16x = 39,970.40 × 15,716.16
  4. Step 4: Simplify right side
    28,964.16x = 628,181,201.66
  5. Step 5: Solve for x
    x = 628,181,201.66/28,964.16
  6. Step 6: Final answer
    x = 21,688.22

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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.