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Finding the Fourth Proportional to 30,445.72, 42,009.72 and 17,012.68

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Solution

The fourth proportional to 30,445.72, 42,009.72 and 17,012.68 is: 23,474.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,445.72 : 42,009.72 = 17,012.68 : x
  2. Step 2: Convert to fraction form
    30,445.72/42,009.72 = 17,012.68/x
  3. Step 3: Cross multiply
    30,445.72x = 42,009.72 × 17,012.68
  4. Step 4: Simplify right side
    30,445.72x = 714,697,923.25
  5. Step 5: Solve for x
    x = 714,697,923.25/30,445.72
  6. Step 6: Final answer
    x = 23,474.50

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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.