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Finding the Fourth Proportional to 8,688.99, 11,990.81 and 4,710.11

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Solution

The fourth proportional to 8,688.99, 11,990.81 and 4,710.11 is: 6,499.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.99 : 11,990.81 = 4,710.11 : x
  2. Step 2: Convert to fraction form
    8,688.99/11,990.81 = 4,710.11/x
  3. Step 3: Cross multiply
    8,688.99x = 11,990.81 × 4,710.11
  4. Step 4: Simplify right side
    8,688.99x = 56,477,950.58
  5. Step 5: Solve for x
    x = 56,477,950.58/8,688.99
  6. Step 6: Final answer
    x = 6,499.94

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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.