Home / 21,157.04-29,202.72-12,774.08

Finding the Fourth Proportional to 21,157.04, 29,202.72 and 12,774.08

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Solution

The fourth proportional to 21,157.04, 29,202.72 and 12,774.08 is: 17,631.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.04 : 29,202.72 = 12,774.08 : x
  2. Step 2: Convert to fraction form
    21,157.04/29,202.72 = 12,774.08/x
  3. Step 3: Cross multiply
    21,157.04x = 29,202.72 × 12,774.08
  4. Step 4: Simplify right side
    21,157.04x = 373,037,881.50
  5. Step 5: Solve for x
    x = 373,037,881.50/21,157.04
  6. Step 6: Final answer
    x = 17,631.86

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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.