Home / 28,582.80-42,896.40-18,719.28

Finding the Fourth Proportional to 28,582.80, 42,896.40 and 18,719.28

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Solution

The fourth proportional to 28,582.80, 42,896.40 and 18,719.28 is: 28,093.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,582.80 : 42,896.40 = 18,719.28 : x
  2. Step 2: Convert to fraction form
    28,582.80/42,896.40 = 18,719.28/x
  3. Step 3: Cross multiply
    28,582.80x = 42,896.40 × 18,719.28
  4. Step 4: Simplify right side
    28,582.80x = 802,989,722.59
  5. Step 5: Solve for x
    x = 802,989,722.59/28,582.80
  6. Step 6: Final answer
    x = 28,093.46

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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.