Home / 30,686.64-42,351.18-17,258.40

Finding the Fourth Proportional to 30,686.64, 42,351.18 and 17,258.40

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Solution

The fourth proportional to 30,686.64, 42,351.18 and 17,258.40 is: 23,818.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,686.64 : 42,351.18 = 17,258.40 : x
  2. Step 2: Convert to fraction form
    30,686.64/42,351.18 = 17,258.40/x
  3. Step 3: Cross multiply
    30,686.64x = 42,351.18 × 17,258.40
  4. Step 4: Simplify right side
    30,686.64x = 730,913,604.91
  5. Step 5: Solve for x
    x = 730,913,604.91/30,686.64
  6. Step 6: Final answer
    x = 23,818.63

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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.