Home / 13,777.80-19,013.60-7,809.32

Finding the Fourth Proportional to 13,777.80, 19,013.60 and 7,809.32

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Solution

The fourth proportional to 13,777.80, 19,013.60 and 7,809.32 is: 10,777.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,777.80 : 19,013.60 = 7,809.32 : x
  2. Step 2: Convert to fraction form
    13,777.80/19,013.60 = 7,809.32/x
  3. Step 3: Cross multiply
    13,777.80x = 19,013.60 × 7,809.32
  4. Step 4: Simplify right side
    13,777.80x = 148,483,286.75
  5. Step 5: Solve for x
    x = 148,483,286.75/13,777.80
  6. Step 6: Final answer
    x = 10,777.00

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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.