Home / 18,915.39-28,374.84-4,875.48

Finding the Fourth Proportional to 18,915.39, 28,374.84 and 4,875.48

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Solution

The fourth proportional to 18,915.39, 28,374.84 and 4,875.48 is: 7,313.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915.39 : 28,374.84 = 4,875.48 : x
  2. Step 2: Convert to fraction form
    18,915.39/28,374.84 = 4,875.48/x
  3. Step 3: Cross multiply
    18,915.39x = 28,374.84 × 4,875.48
  4. Step 4: Simplify right side
    18,915.39x = 138,340,964.92
  5. Step 5: Solve for x
    x = 138,340,964.92/18,915.39
  6. Step 6: Final answer
    x = 7,313.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.