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Finding the Fourth Proportional to 30,873, 42,615.18 and 19,240.32

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Solution

The fourth proportional to 30,873, 42,615.18 and 19,240.32 is: 26,558.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,873 : 42,615.18 = 19,240.32 : x
  2. Step 2: Convert to fraction form
    30,873/42,615.18 = 19,240.32/x
  3. Step 3: Cross multiply
    30,873x = 42,615.18 × 19,240.32
  4. Step 4: Simplify right side
    30,873x = 819,929,700.06
  5. Step 5: Solve for x
    x = 819,929,700.06/30,873
  6. Step 6: Final answer
    x = 26,558.15

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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.