Home / 28,253.89-38,989.60-15,507.06

Finding the Fourth Proportional to 28,253.89, 38,989.60 and 15,507.06

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Solution

The fourth proportional to 28,253.89, 38,989.60 and 15,507.06 is: 21,399.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,253.89 : 38,989.60 = 15,507.06 : x
  2. Step 2: Convert to fraction form
    28,253.89/38,989.60 = 15,507.06/x
  3. Step 3: Cross multiply
    28,253.89x = 38,989.60 × 15,507.06
  4. Step 4: Simplify right side
    28,253.89x = 604,614,066.58
  5. Step 5: Solve for x
    x = 604,614,066.58/28,253.89
  6. Step 6: Final answer
    x = 21,399.32

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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.