Home / 28,579.64-42,869.46-15,438.20

Finding the Fourth Proportional to 28,579.64, 42,869.46 and 15,438.20

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Solution

The fourth proportional to 28,579.64, 42,869.46 and 15,438.20 is: 23,157.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,579.64 : 42,869.46 = 15,438.20 : x
  2. Step 2: Convert to fraction form
    28,579.64/42,869.46 = 15,438.20/x
  3. Step 3: Cross multiply
    28,579.64x = 42,869.46 × 15,438.20
  4. Step 4: Simplify right side
    28,579.64x = 661,827,297.37
  5. Step 5: Solve for x
    x = 661,827,297.37/28,579.64
  6. Step 6: Final answer
    x = 23,157.30

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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.