Home / 6,428.60-8,871.09-3,557.16

Finding the Fourth Proportional to 6,428.60, 8,871.09 and 3,557.16

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Solution

The fourth proportional to 6,428.60, 8,871.09 and 3,557.16 is: 4,908.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.60 : 8,871.09 = 3,557.16 : x
  2. Step 2: Convert to fraction form
    6,428.60/8,871.09 = 3,557.16/x
  3. Step 3: Cross multiply
    6,428.60x = 8,871.09 × 3,557.16
  4. Step 4: Simplify right side
    6,428.60x = 31,555,886.50
  5. Step 5: Solve for x
    x = 31,555,886.50/6,428.60
  6. Step 6: Final answer
    x = 4,908.67

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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.