Home / 15,821.98-21,835.78-8,749.74

Finding the Fourth Proportional to 15,821.98, 21,835.78 and 8,749.74

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Solution

The fourth proportional to 15,821.98, 21,835.78 and 8,749.74 is: 12,075.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,821.98 : 21,835.78 = 8,749.74 : x
  2. Step 2: Convert to fraction form
    15,821.98/21,835.78 = 8,749.74/x
  3. Step 3: Cross multiply
    15,821.98x = 21,835.78 × 8,749.74
  4. Step 4: Simplify right side
    15,821.98x = 191,057,397.70
  5. Step 5: Solve for x
    x = 191,057,397.70/15,821.98
  6. Step 6: Final answer
    x = 12,075.44

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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.