Home / 28,085.28-42,107.13-13,276.91

Finding the Fourth Proportional to 28,085.28, 42,107.13 and 13,276.91

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Solution

The fourth proportional to 28,085.28, 42,107.13 and 13,276.91 is: 19,905.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085.28 : 42,107.13 = 13,276.91 : x
  2. Step 2: Convert to fraction form
    28,085.28/42,107.13 = 13,276.91/x
  3. Step 3: Cross multiply
    28,085.28x = 42,107.13 × 13,276.91
  4. Step 4: Simplify right side
    28,085.28x = 559,052,575.37
  5. Step 5: Solve for x
    x = 559,052,575.37/28,085.28
  6. Step 6: Final answer
    x = 19,905.54

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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.