Home / 21,567.12-29,756.64-12,951.08

Finding the Fourth Proportional to 21,567.12, 29,756.64 and 12,951.08

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Solution

The fourth proportional to 21,567.12, 29,756.64 and 12,951.08 is: 17,868.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,567.12 : 29,756.64 = 12,951.08 : x
  2. Step 2: Convert to fraction form
    21,567.12/29,756.64 = 12,951.08/x
  3. Step 3: Cross multiply
    21,567.12x = 29,756.64 × 12,951.08
  4. Step 4: Simplify right side
    21,567.12x = 385,380,599.35
  5. Step 5: Solve for x
    x = 385,380,599.35/21,567.12
  6. Step 6: Final answer
    x = 17,868.90

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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.