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Finding the Fourth Proportional to 15,633.79, 21,574.87 and 8,560.87

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Solution

The fourth proportional to 15,633.79, 21,574.87 and 8,560.87 is: 11,814.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,633.79 : 21,574.87 = 8,560.87 : x
  2. Step 2: Convert to fraction form
    15,633.79/21,574.87 = 8,560.87/x
  3. Step 3: Cross multiply
    15,633.79x = 21,574.87 × 8,560.87
  4. Step 4: Simplify right side
    15,633.79x = 184,699,721.98
  5. Step 5: Solve for x
    x = 184,699,721.98/15,633.79
  6. Step 6: Final answer
    x = 11,814.13

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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.