Home / 28,105.56-38,784.15-15,529.50

Finding the Fourth Proportional to 28,105.56, 38,784.15 and 15,529.50

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Solution

The fourth proportional to 28,105.56, 38,784.15 and 15,529.50 is: 21,429.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105.56 : 38,784.15 = 15,529.50 : x
  2. Step 2: Convert to fraction form
    28,105.56/38,784.15 = 15,529.50/x
  3. Step 3: Cross multiply
    28,105.56x = 38,784.15 × 15,529.50
  4. Step 4: Simplify right side
    28,105.56x = 602,298,457.43
  5. Step 5: Solve for x
    x = 602,298,457.43/28,105.56
  6. Step 6: Final answer
    x = 21,429.87

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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.