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Finding the Fourth Proportional to 15,703.34, 21,669.59 and 8,989.02

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Solution

The fourth proportional to 15,703.34, 21,669.59 and 8,989.02 is: 12,404.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,703.34 : 21,669.59 = 8,989.02 : x
  2. Step 2: Convert to fraction form
    15,703.34/21,669.59 = 8,989.02/x
  3. Step 3: Cross multiply
    15,703.34x = 21,669.59 × 8,989.02
  4. Step 4: Simplify right side
    15,703.34x = 194,788,377.90
  5. Step 5: Solve for x
    x = 194,788,377.90/15,703.34
  6. Step 6: Final answer
    x = 12,404.26

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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.