Home / 28,439.64-39,238.83-18,368.51

Finding the Fourth Proportional to 28,439.64, 39,238.83 and 18,368.51

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Solution

The fourth proportional to 28,439.64, 39,238.83 and 18,368.51 is: 25,343.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.64 : 39,238.83 = 18,368.51 : x
  2. Step 2: Convert to fraction form
    28,439.64/39,238.83 = 18,368.51/x
  3. Step 3: Cross multiply
    28,439.64x = 39,238.83 × 18,368.51
  4. Step 4: Simplify right side
    28,439.64x = 720,758,645.05
  5. Step 5: Solve for x
    x = 720,758,645.05/28,439.64
  6. Step 6: Final answer
    x = 25,343.45

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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.