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Finding the Fourth Proportional to 28,144.48, 38,838.48 and 15,568.96

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Solution

The fourth proportional to 28,144.48, 38,838.48 and 15,568.96 is: 21,484.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,144.48 : 38,838.48 = 15,568.96 : x
  2. Step 2: Convert to fraction form
    28,144.48/38,838.48 = 15,568.96/x
  3. Step 3: Cross multiply
    28,144.48x = 38,838.48 × 15,568.96
  4. Step 4: Simplify right side
    28,144.48x = 604,674,741.58
  5. Step 5: Solve for x
    x = 604,674,741.58/28,144.48
  6. Step 6: Final answer
    x = 21,484.67

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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.