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Finding the Fourth Proportional to 14,643.15, 20,210.53 and 9,928.95

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Solution

The fourth proportional to 14,643.15, 20,210.53 and 9,928.95 is: 13,703.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,643.15 : 20,210.53 = 9,928.95 : x
  2. Step 2: Convert to fraction form
    14,643.15/20,210.53 = 9,928.95/x
  3. Step 3: Cross multiply
    14,643.15x = 20,210.53 × 9,928.95
  4. Step 4: Simplify right side
    14,643.15x = 200,669,404.78
  5. Step 5: Solve for x
    x = 200,669,404.78/14,643.15
  6. Step 6: Final answer
    x = 13,703.98

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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.