Home / 21,475.98-29,629.71-12,980.70

Finding the Fourth Proportional to 21,475.98, 29,629.71 and 12,980.70

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Solution

The fourth proportional to 21,475.98, 29,629.71 and 12,980.70 is: 17,909.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,475.98 : 29,629.71 = 12,980.70 : x
  2. Step 2: Convert to fraction form
    21,475.98/29,629.71 = 12,980.70/x
  3. Step 3: Cross multiply
    21,475.98x = 29,629.71 × 12,980.70
  4. Step 4: Simplify right side
    21,475.98x = 384,614,376.60
  5. Step 5: Solve for x
    x = 384,614,376.60/21,475.98
  6. Step 6: Final answer
    x = 17,909.05

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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.