Home / 28,513.78-42,777.96-11,868.28

Finding the Fourth Proportional to 28,513.78, 42,777.96 and 11,868.28

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Solution

The fourth proportional to 28,513.78, 42,777.96 and 11,868.28 is: 17,805.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,513.78 : 42,777.96 = 11,868.28 : x
  2. Step 2: Convert to fraction form
    28,513.78/42,777.96 = 11,868.28/x
  3. Step 3: Cross multiply
    28,513.78x = 42,777.96 × 11,868.28
  4. Step 4: Simplify right side
    28,513.78x = 507,700,655.66
  5. Step 5: Solve for x
    x = 507,700,655.66/28,513.78
  6. Step 6: Final answer
    x = 17,805.45

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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.