Home / 10,128.05-15,168.59-9,777.64

Finding the Fourth Proportional to 10,128.05, 15,168.59 and 9,777.64

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Solution

The fourth proportional to 10,128.05, 15,168.59 and 9,777.64 is: 14,643.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.05 : 15,168.59 = 9,777.64 : x
  2. Step 2: Convert to fraction form
    10,128.05/15,168.59 = 9,777.64/x
  3. Step 3: Cross multiply
    10,128.05x = 15,168.59 × 9,777.64
  4. Step 4: Simplify right side
    10,128.05x = 148,312,887.60
  5. Step 5: Solve for x
    x = 148,312,887.60/10,128.05
  6. Step 6: Final answer
    x = 14,643.78

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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.