Home / 15,703.30-21,671.75-8,991.03

Finding the Fourth Proportional to 15,703.30, 21,671.75 and 8,991.03

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Solution

The fourth proportional to 15,703.30, 21,671.75 and 8,991.03 is: 12,408.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,703.30 : 21,671.75 = 8,991.03 : x
  2. Step 2: Convert to fraction form
    15,703.30/21,671.75 = 8,991.03/x
  3. Step 3: Cross multiply
    15,703.30x = 21,671.75 × 8,991.03
  4. Step 4: Simplify right side
    15,703.30x = 194,851,354.40
  5. Step 5: Solve for x
    x = 194,851,354.40/15,703.30
  6. Step 6: Final answer
    x = 12,408.31

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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.