Home / 30,689.26-42,328.50-18,742.76

Finding the Fourth Proportional to 30,689.26, 42,328.50 and 18,742.76

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Solution

The fourth proportional to 30,689.26, 42,328.50 and 18,742.76 is: 25,851.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,689.26 : 42,328.50 = 18,742.76 : x
  2. Step 2: Convert to fraction form
    30,689.26/42,328.50 = 18,742.76/x
  3. Step 3: Cross multiply
    30,689.26x = 42,328.50 × 18,742.76
  4. Step 4: Simplify right side
    30,689.26x = 793,352,916.66
  5. Step 5: Solve for x
    x = 793,352,916.66/30,689.26
  6. Step 6: Final answer
    x = 25,851.16

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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.