Home / 10,890.31-16,255.53-9,966.91

Finding the Fourth Proportional to 10,890.31, 16,255.53 and 9,966.91

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Solution

The fourth proportional to 10,890.31, 16,255.53 and 9,966.91 is: 14,877.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,890.31 : 16,255.53 = 9,966.91 : x
  2. Step 2: Convert to fraction form
    10,890.31/16,255.53 = 9,966.91/x
  3. Step 3: Cross multiply
    10,890.31x = 16,255.53 × 9,966.91
  4. Step 4: Simplify right side
    10,890.31x = 162,017,404.51
  5. Step 5: Solve for x
    x = 162,017,404.51/10,890.31
  6. Step 6: Final answer
    x = 14,877.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.