Home / 21,000.53-31,500.79-11,159.03

Finding the Fourth Proportional to 21,000.53, 31,500.79 and 11,159.03

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Solution

The fourth proportional to 21,000.53, 31,500.79 and 11,159.03 is: 16,738.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.53 : 31,500.79 = 11,159.03 : x
  2. Step 2: Convert to fraction form
    21,000.53/31,500.79 = 11,159.03/x
  3. Step 3: Cross multiply
    21,000.53x = 31,500.79 × 11,159.03
  4. Step 4: Simplify right side
    21,000.53x = 351,518,075.23
  5. Step 5: Solve for x
    x = 351,518,075.23/21,000.53
  6. Step 6: Final answer
    x = 16,738.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.