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Finding the Fourth Proportional to 8,695.51, 11,990.29 and 6,461.53

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Solution

The fourth proportional to 8,695.51, 11,990.29 and 6,461.53 is: 8,909.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,695.51 : 11,990.29 = 6,461.53 : x
  2. Step 2: Convert to fraction form
    8,695.51/11,990.29 = 6,461.53/x
  3. Step 3: Cross multiply
    8,695.51x = 11,990.29 × 6,461.53
  4. Step 4: Simplify right side
    8,695.51x = 77,475,526.28
  5. Step 5: Solve for x
    x = 77,475,526.28/8,695.51
  6. Step 6: Final answer
    x = 8,909.84

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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.