Home / 21,157.98-29,186.40-13,487.01

Finding the Fourth Proportional to 21,157.98, 29,186.40 and 13,487.01

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Solution

The fourth proportional to 21,157.98, 29,186.40 and 13,487.01 is: 18,604.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.98 : 29,186.40 = 13,487.01 : x
  2. Step 2: Convert to fraction form
    21,157.98/29,186.40 = 13,487.01/x
  3. Step 3: Cross multiply
    21,157.98x = 29,186.40 × 13,487.01
  4. Step 4: Simplify right side
    21,157.98x = 393,637,268.66
  5. Step 5: Solve for x
    x = 393,637,268.66/21,157.98
  6. Step 6: Final answer
    x = 18,604.67

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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.