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Finding the Fourth Proportional to 13,700.58, 20,430.57 and 13,575.84

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Solution

The fourth proportional to 13,700.58, 20,430.57 and 13,575.84 is: 20,244.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.58 : 20,430.57 = 13,575.84 : x
  2. Step 2: Convert to fraction form
    13,700.58/20,430.57 = 13,575.84/x
  3. Step 3: Cross multiply
    13,700.58x = 20,430.57 × 13,575.84
  4. Step 4: Simplify right side
    13,700.58x = 277,362,149.43
  5. Step 5: Solve for x
    x = 277,362,149.43/13,700.58
  6. Step 6: Final answer
    x = 20,244.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.