Home / 10,878.10-15,027.30-10,090.78

Finding the Fourth Proportional to 10,878.10, 15,027.30 and 10,090.78

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Solution

The fourth proportional to 10,878.10, 15,027.30 and 10,090.78 is: 13,939.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,878.10 : 15,027.30 = 10,090.78 : x
  2. Step 2: Convert to fraction form
    10,878.10/15,027.30 = 10,090.78/x
  3. Step 3: Cross multiply
    10,878.10x = 15,027.30 × 10,090.78
  4. Step 4: Simplify right side
    10,878.10x = 151,637,178.29
  5. Step 5: Solve for x
    x = 151,637,178.29/10,878.10
  6. Step 6: Final answer
    x = 13,939.67

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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.