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Finding the Fourth Proportional to 19,903.86, 27,477.90 and 15,417.54

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Solution

The fourth proportional to 19,903.86, 27,477.90 and 15,417.54 is: 21,284.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,903.86 : 27,477.90 = 15,417.54 : x
  2. Step 2: Convert to fraction form
    19,903.86/27,477.90 = 15,417.54/x
  3. Step 3: Cross multiply
    19,903.86x = 27,477.90 × 15,417.54
  4. Step 4: Simplify right side
    19,903.86x = 423,641,622.37
  5. Step 5: Solve for x
    x = 423,641,622.37/19,903.86
  6. Step 6: Final answer
    x = 21,284.40

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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.