Home / 13,290.40-19,903.20-9,985.60

Finding the Fourth Proportional to 13,290.40, 19,903.20 and 9,985.60

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Solution

The fourth proportional to 13,290.40, 19,903.20 and 9,985.60 is: 14,954.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.40 : 19,903.20 = 9,985.60 : x
  2. Step 2: Convert to fraction form
    13,290.40/19,903.20 = 9,985.60/x
  3. Step 3: Cross multiply
    13,290.40x = 19,903.20 × 9,985.60
  4. Step 4: Simplify right side
    13,290.40x = 198,745,393.92
  5. Step 5: Solve for x
    x = 198,745,393.92/13,290.40
  6. Step 6: Final answer
    x = 14,954.06

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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.