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Finding the Fourth Proportional to 19,373.12, 26,728.80 and 11,412.80

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Solution

The fourth proportional to 19,373.12, 26,728.80 and 11,412.80 is: 15,746.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,373.12 : 26,728.80 = 11,412.80 : x
  2. Step 2: Convert to fraction form
    19,373.12/26,728.80 = 11,412.80/x
  3. Step 3: Cross multiply
    19,373.12x = 26,728.80 × 11,412.80
  4. Step 4: Simplify right side
    19,373.12x = 305,050,448.64
  5. Step 5: Solve for x
    x = 305,050,448.64/19,373.12
  6. Step 6: Final answer
    x = 15,746.07

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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.