Home / 30,438.72-42,004.80-17,009.60

Finding the Fourth Proportional to 30,438.72, 42,004.80 and 17,009.60

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Solution

The fourth proportional to 30,438.72, 42,004.80 and 17,009.60 is: 23,472.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,438.72 : 42,004.80 = 17,009.60 : x
  2. Step 2: Convert to fraction form
    30,438.72/42,004.80 = 17,009.60/x
  3. Step 3: Cross multiply
    30,438.72x = 42,004.80 × 17,009.60
  4. Step 4: Simplify right side
    30,438.72x = 714,484,846.08
  5. Step 5: Solve for x
    x = 714,484,846.08/30,438.72
  6. Step 6: Final answer
    x = 23,472.89

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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.