Home / 8,455.30-12,690.70-4,298.20

Finding the Fourth Proportional to 8,455.30, 12,690.70 and 4,298.20

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Solution

The fourth proportional to 8,455.30, 12,690.70 and 4,298.20 is: 6,451.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,455.30 : 12,690.70 = 4,298.20 : x
  2. Step 2: Convert to fraction form
    8,455.30/12,690.70 = 4,298.20/x
  3. Step 3: Cross multiply
    8,455.30x = 12,690.70 × 4,298.20
  4. Step 4: Simplify right side
    8,455.30x = 54,547,166.74
  5. Step 5: Solve for x
    x = 54,547,166.74/8,455.30
  6. Step 6: Final answer
    x = 6,451.24

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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.