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Finding the Fourth Proportional to 12,953.80, 19,430.70 and 11,873.80

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Solution

The fourth proportional to 12,953.80, 19,430.70 and 11,873.80 is: 17,810.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,953.80 : 19,430.70 = 11,873.80 : x
  2. Step 2: Convert to fraction form
    12,953.80/19,430.70 = 11,873.80/x
  3. Step 3: Cross multiply
    12,953.80x = 19,430.70 × 11,873.80
  4. Step 4: Simplify right side
    12,953.80x = 230,716,245.66
  5. Step 5: Solve for x
    x = 230,716,245.66/12,953.80
  6. Step 6: Final answer
    x = 17,810.70

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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.