Home / 6,428.08-8,869.32-3,911.50

Finding the Fourth Proportional to 6,428.08, 8,869.32 and 3,911.50

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Solution

The fourth proportional to 6,428.08, 8,869.32 and 3,911.50 is: 5,397.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.08 : 8,869.32 = 3,911.50 : x
  2. Step 2: Convert to fraction form
    6,428.08/8,869.32 = 3,911.50/x
  3. Step 3: Cross multiply
    6,428.08x = 8,869.32 × 3,911.50
  4. Step 4: Simplify right side
    6,428.08x = 34,692,345.18
  5. Step 5: Solve for x
    x = 34,692,345.18/6,428.08
  6. Step 6: Final answer
    x = 5,397.00

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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.