Home / 28,101.99-38,779.59-15,355.61

Finding the Fourth Proportional to 28,101.99, 38,779.59 and 15,355.61

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Solution

The fourth proportional to 28,101.99, 38,779.59 and 15,355.61 is: 21,190.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,101.99 : 38,779.59 = 15,355.61 : x
  2. Step 2: Convert to fraction form
    28,101.99/38,779.59 = 15,355.61/x
  3. Step 3: Cross multiply
    28,101.99x = 38,779.59 × 15,355.61
  4. Step 4: Simplify right side
    28,101.99x = 595,484,260.00
  5. Step 5: Solve for x
    x = 595,484,260.00/28,101.99
  6. Step 6: Final answer
    x = 21,190.11

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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.