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Finding the Fourth Proportional to 14,642.79, 20,207.04 and 7,928.41

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Solution

The fourth proportional to 14,642.79, 20,207.04 and 7,928.41 is: 10,941.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,642.79 : 20,207.04 = 7,928.41 : x
  2. Step 2: Convert to fraction form
    14,642.79/20,207.04 = 7,928.41/x
  3. Step 3: Cross multiply
    14,642.79x = 20,207.04 × 7,928.41
  4. Step 4: Simplify right side
    14,642.79x = 160,209,698.01
  5. Step 5: Solve for x
    x = 160,209,698.01/14,642.79
  6. Step 6: Final answer
    x = 10,941.20

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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.