Home / 13,430.31-20,143.86-3,570.35

Finding the Fourth Proportional to 13,430.31, 20,143.86 and 3,570.35

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Solution

The fourth proportional to 13,430.31, 20,143.86 and 3,570.35 is: 5,355.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.31 : 20,143.86 = 3,570.35 : x
  2. Step 2: Convert to fraction form
    13,430.31/20,143.86 = 3,570.35/x
  3. Step 3: Cross multiply
    13,430.31x = 20,143.86 × 3,570.35
  4. Step 4: Simplify right side
    13,430.31x = 71,920,630.55
  5. Step 5: Solve for x
    x = 71,920,630.55/13,430.31
  6. Step 6: Final answer
    x = 5,355.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.