Home / 30,776.51-42,506.60-20,687.43

Finding the Fourth Proportional to 30,776.51, 42,506.60 and 20,687.43

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Solution

The fourth proportional to 30,776.51, 42,506.60 and 20,687.43 is: 28,572.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,776.51 : 42,506.60 = 20,687.43 : x
  2. Step 2: Convert to fraction form
    30,776.51/42,506.60 = 20,687.43/x
  3. Step 3: Cross multiply
    30,776.51x = 42,506.60 × 20,687.43
  4. Step 4: Simplify right side
    30,776.51x = 879,352,444.16
  5. Step 5: Solve for x
    x = 879,352,444.16/30,776.51
  6. Step 6: Final answer
    x = 28,572.19

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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.