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Finding the Fourth Proportional to 15,568.94, 21,488.59 and 9,902.59

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Solution

The fourth proportional to 15,568.94, 21,488.59 and 9,902.59 is: 13,667.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,568.94 : 21,488.59 = 9,902.59 : x
  2. Step 2: Convert to fraction form
    15,568.94/21,488.59 = 9,902.59/x
  3. Step 3: Cross multiply
    15,568.94x = 21,488.59 × 9,902.59
  4. Step 4: Simplify right side
    15,568.94x = 212,792,655.10
  5. Step 5: Solve for x
    x = 212,792,655.10/15,568.94
  6. Step 6: Final answer
    x = 13,667.77

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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.