Home / 26,787.76-36,931.96-21,990.16

Finding the Fourth Proportional to 26,787.76, 36,931.96 and 21,990.16

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Solution

The fourth proportional to 26,787.76, 36,931.96 and 21,990.16 is: 30,317.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,787.76 : 36,931.96 = 21,990.16 : x
  2. Step 2: Convert to fraction form
    26,787.76/36,931.96 = 21,990.16/x
  3. Step 3: Cross multiply
    26,787.76x = 36,931.96 × 21,990.16
  4. Step 4: Simplify right side
    26,787.76x = 812,139,709.51
  5. Step 5: Solve for x
    x = 812,139,709.51/26,787.76
  6. Step 6: Final answer
    x = 30,317.57

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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.