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Finding the Fourth Proportional to 21,117.66, 31,676.49 and 7,075.08

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Solution

The fourth proportional to 21,117.66, 31,676.49 and 7,075.08 is: 10,612.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.66 : 31,676.49 = 7,075.08 : x
  2. Step 2: Convert to fraction form
    21,117.66/31,676.49 = 7,075.08/x
  3. Step 3: Cross multiply
    21,117.66x = 31,676.49 × 7,075.08
  4. Step 4: Simplify right side
    21,117.66x = 224,113,700.87
  5. Step 5: Solve for x
    x = 224,113,700.87/21,117.66
  6. Step 6: Final answer
    x = 10,612.62

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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.