Home / 14,478.23-19,978.29-8,105.20

Finding the Fourth Proportional to 14,478.23, 19,978.29 and 8,105.20

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Solution

The fourth proportional to 14,478.23, 19,978.29 and 8,105.20 is: 11,184.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,478.23 : 19,978.29 = 8,105.20 : x
  2. Step 2: Convert to fraction form
    14,478.23/19,978.29 = 8,105.20/x
  3. Step 3: Cross multiply
    14,478.23x = 19,978.29 × 8,105.20
  4. Step 4: Simplify right side
    14,478.23x = 161,927,986.16
  5. Step 5: Solve for x
    x = 161,927,986.16/14,478.23
  6. Step 6: Final answer
    x = 11,184.24

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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.