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Finding the Fourth Proportional to 13,509.32, 20,238.66 and 7,946.03

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Solution

The fourth proportional to 13,509.32, 20,238.66 and 7,946.03 is: 11,904.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,509.32 : 20,238.66 = 7,946.03 : x
  2. Step 2: Convert to fraction form
    13,509.32/20,238.66 = 7,946.03/x
  3. Step 3: Cross multiply
    13,509.32x = 20,238.66 × 7,946.03
  4. Step 4: Simplify right side
    13,509.32x = 160,817,050.12
  5. Step 5: Solve for x
    x = 160,817,050.12/13,509.32
  6. Step 6: Final answer
    x = 11,904.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.