Home / 15,558.96-21,464.58-9,890.70

Finding the Fourth Proportional to 15,558.96, 21,464.58 and 9,890.70

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Solution

The fourth proportional to 15,558.96, 21,464.58 and 9,890.70 is: 13,644.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,558.96 : 21,464.58 = 9,890.70 : x
  2. Step 2: Convert to fraction form
    15,558.96/21,464.58 = 9,890.70/x
  3. Step 3: Cross multiply
    15,558.96x = 21,464.58 × 9,890.70
  4. Step 4: Simplify right side
    15,558.96x = 212,299,721.41
  5. Step 5: Solve for x
    x = 212,299,721.41/15,558.96
  6. Step 6: Final answer
    x = 13,644.85

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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.