Home / 21,853.55-30,157.40-13,355.64

Finding the Fourth Proportional to 21,853.55, 30,157.40 and 13,355.64

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Solution

The fourth proportional to 21,853.55, 30,157.40 and 13,355.64 is: 18,430.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,853.55 : 30,157.40 = 13,355.64 : x
  2. Step 2: Convert to fraction form
    21,853.55/30,157.40 = 13,355.64/x
  3. Step 3: Cross multiply
    21,853.55x = 30,157.40 × 13,355.64
  4. Step 4: Simplify right side
    21,853.55x = 402,771,310.96
  5. Step 5: Solve for x
    x = 402,771,310.96/21,853.55
  6. Step 6: Final answer
    x = 18,430.48

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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.