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Finding the Fourth Proportional to 8,477.40, 12,715.90 and 2,321.40

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Solution

The fourth proportional to 8,477.40, 12,715.90 and 2,321.40 is: 3,482.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,477.40 : 12,715.90 = 2,321.40 : x
  2. Step 2: Convert to fraction form
    8,477.40/12,715.90 = 2,321.40/x
  3. Step 3: Cross multiply
    8,477.40x = 12,715.90 × 2,321.40
  4. Step 4: Simplify right side
    8,477.40x = 29,518,690.26
  5. Step 5: Solve for x
    x = 29,518,690.26/8,477.40
  6. Step 6: Final answer
    x = 3,482.05

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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.