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Finding the Fourth Proportional to 28,656.99, 42,969.99 and 9,935.66

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Solution

The fourth proportional to 28,656.99, 42,969.99 and 9,935.66 is: 14,898.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,656.99 : 42,969.99 = 9,935.66 : x
  2. Step 2: Convert to fraction form
    28,656.99/42,969.99 = 9,935.66/x
  3. Step 3: Cross multiply
    28,656.99x = 42,969.99 × 9,935.66
  4. Step 4: Simplify right side
    28,656.99x = 426,935,355.53
  5. Step 5: Solve for x
    x = 426,935,355.53/28,656.99
  6. Step 6: Final answer
    x = 14,898.12

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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.