Home / 30,963.74-42,730.80-18,217.76

Finding the Fourth Proportional to 30,963.74, 42,730.80 and 18,217.76

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Solution

The fourth proportional to 30,963.74, 42,730.80 and 18,217.76 is: 25,141.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,963.74 : 42,730.80 = 18,217.76 : x
  2. Step 2: Convert to fraction form
    30,963.74/42,730.80 = 18,217.76/x
  3. Step 3: Cross multiply
    30,963.74x = 42,730.80 × 18,217.76
  4. Step 4: Simplify right side
    30,963.74x = 778,459,459.01
  5. Step 5: Solve for x
    x = 778,459,459.01/30,963.74
  6. Step 6: Final answer
    x = 25,141.00

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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.