Home / 13,365.04-18,440.40-7,772.80

Finding the Fourth Proportional to 13,365.04, 18,440.40 and 7,772.80

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Solution

The fourth proportional to 13,365.04, 18,440.40 and 7,772.80 is: 10,724.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,365.04 : 18,440.40 = 7,772.80 : x
  2. Step 2: Convert to fraction form
    13,365.04/18,440.40 = 7,772.80/x
  3. Step 3: Cross multiply
    13,365.04x = 18,440.40 × 7,772.80
  4. Step 4: Simplify right side
    13,365.04x = 143,333,541.12
  5. Step 5: Solve for x
    x = 143,333,541.12/13,365.04
  6. Step 6: Final answer
    x = 10,724.51

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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.