Home / 8,457.91-12,615.35-7,970.08

Finding the Fourth Proportional to 8,457.91, 12,615.35 and 7,970.08

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Solution

The fourth proportional to 8,457.91, 12,615.35 and 7,970.08 is: 11,887.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,457.91 : 12,615.35 = 7,970.08 : x
  2. Step 2: Convert to fraction form
    8,457.91/12,615.35 = 7,970.08/x
  3. Step 3: Cross multiply
    8,457.91x = 12,615.35 × 7,970.08
  4. Step 4: Simplify right side
    8,457.91x = 100,545,348.73
  5. Step 5: Solve for x
    x = 100,545,348.73/8,457.91
  6. Step 6: Final answer
    x = 11,887.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.