Home / 28,199.99-38,909.13-15,624.74

Finding the Fourth Proportional to 28,199.99, 38,909.13 and 15,624.74

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Solution

The fourth proportional to 28,199.99, 38,909.13 and 15,624.74 is: 21,558.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,199.99 : 38,909.13 = 15,624.74 : x
  2. Step 2: Convert to fraction form
    28,199.99/38,909.13 = 15,624.74/x
  3. Step 3: Cross multiply
    28,199.99x = 38,909.13 × 15,624.74
  4. Step 4: Simplify right side
    28,199.99x = 607,945,137.15
  5. Step 5: Solve for x
    x = 607,945,137.15/28,199.99
  6. Step 6: Final answer
    x = 21,558.34

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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.