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Finding the Fourth Proportional to 31,505.40, 43,477.20 and 17,357.40

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Solution

The fourth proportional to 31,505.40, 43,477.20 and 17,357.40 is: 23,953.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,505.40 : 43,477.20 = 17,357.40 : x
  2. Step 2: Convert to fraction form
    31,505.40/43,477.20 = 17,357.40/x
  3. Step 3: Cross multiply
    31,505.40x = 43,477.20 × 17,357.40
  4. Step 4: Simplify right side
    31,505.40x = 754,651,151.28
  5. Step 5: Solve for x
    x = 754,651,151.28/31,505.40
  6. Step 6: Final answer
    x = 23,953.07

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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.