Home / 18,931.46-28,212.64-18,361.40

Finding the Fourth Proportional to 18,931.46, 28,212.64 and 18,361.40

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Solution

The fourth proportional to 18,931.46, 28,212.64 and 18,361.40 is: 27,363.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.46 : 28,212.64 = 18,361.40 : x
  2. Step 2: Convert to fraction form
    18,931.46/28,212.64 = 18,361.40/x
  3. Step 3: Cross multiply
    18,931.46x = 28,212.64 × 18,361.40
  4. Step 4: Simplify right side
    18,931.46x = 518,023,568.10
  5. Step 5: Solve for x
    x = 518,023,568.10/18,931.46
  6. Step 6: Final answer
    x = 27,363.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.