Home / 14,978.28-20,666.43-9,672.18

Finding the Fourth Proportional to 14,978.28, 20,666.43 and 9,672.18

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Solution

The fourth proportional to 14,978.28, 20,666.43 and 9,672.18 is: 13,345.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,978.28 : 20,666.43 = 9,672.18 : x
  2. Step 2: Convert to fraction form
    14,978.28/20,666.43 = 9,672.18/x
  3. Step 3: Cross multiply
    14,978.28x = 20,666.43 × 9,672.18
  4. Step 4: Simplify right side
    14,978.28x = 199,889,430.92
  5. Step 5: Solve for x
    x = 199,889,430.92/14,978.28
  6. Step 6: Final answer
    x = 13,345.29

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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.