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Finding the Fourth Proportional to 38,136, 52,627.68 and 21,374.40

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Solution

The fourth proportional to 38,136, 52,627.68 and 21,374.40 is: 29,496.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,136 : 52,627.68 = 21,374.40 : x
  2. Step 2: Convert to fraction form
    38,136/52,627.68 = 21,374.40/x
  3. Step 3: Cross multiply
    38,136x = 52,627.68 × 21,374.40
  4. Step 4: Simplify right side
    38,136x = 1,124,885,083.39
  5. Step 5: Solve for x
    x = 1,124,885,083.39/38,136
  6. Step 6: Final answer
    x = 29,496.67

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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.