Home / 19,485.60-29,242.80-7,807.20

Finding the Fourth Proportional to 19,485.60, 29,242.80 and 7,807.20

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Solution

The fourth proportional to 19,485.60, 29,242.80 and 7,807.20 is: 11,716.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,485.60 : 29,242.80 = 7,807.20 : x
  2. Step 2: Convert to fraction form
    19,485.60/29,242.80 = 7,807.20/x
  3. Step 3: Cross multiply
    19,485.60x = 29,242.80 × 7,807.20
  4. Step 4: Simplify right side
    19,485.60x = 228,304,388.16
  5. Step 5: Solve for x
    x = 228,304,388.16/19,485.60
  6. Step 6: Final answer
    x = 11,716.57

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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.