Home / 30,859.82-42,587.38-18,916.30

Finding the Fourth Proportional to 30,859.82, 42,587.38 and 18,916.30

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Solution

The fourth proportional to 30,859.82, 42,587.38 and 18,916.30 is: 26,105.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,859.82 : 42,587.38 = 18,916.30 : x
  2. Step 2: Convert to fraction form
    30,859.82/42,587.38 = 18,916.30/x
  3. Step 3: Cross multiply
    30,859.82x = 42,587.38 × 18,916.30
  4. Step 4: Simplify right side
    30,859.82x = 805,595,580.11
  5. Step 5: Solve for x
    x = 805,595,580.11/30,859.82
  6. Step 6: Final answer
    x = 26,105.00

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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.