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Finding the Fourth Proportional to 30,904.47, 42,643.02 and 19,417.59

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Solution

The fourth proportional to 30,904.47, 42,643.02 and 19,417.59 is: 26,793.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,904.47 : 42,643.02 = 19,417.59 : x
  2. Step 2: Convert to fraction form
    30,904.47/42,643.02 = 19,417.59/x
  3. Step 3: Cross multiply
    30,904.47x = 42,643.02 × 19,417.59
  4. Step 4: Simplify right side
    30,904.47x = 828,024,751.54
  5. Step 5: Solve for x
    x = 828,024,751.54/30,904.47
  6. Step 6: Final answer
    x = 26,793.04

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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.