Home / 31,051.96-42,837.86-20,977.16

Finding the Fourth Proportional to 31,051.96, 42,837.86 and 20,977.16

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Solution

The fourth proportional to 31,051.96, 42,837.86 and 20,977.16 is: 28,939.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,051.96 : 42,837.86 = 20,977.16 : x
  2. Step 2: Convert to fraction form
    31,051.96/42,837.86 = 20,977.16/x
  3. Step 3: Cross multiply
    31,051.96x = 42,837.86 × 20,977.16
  4. Step 4: Simplify right side
    31,051.96x = 898,616,643.28
  5. Step 5: Solve for x
    x = 898,616,643.28/31,051.96
  6. Step 6: Final answer
    x = 28,939.13

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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.