Home / 2,130.32-2,938.32-1,421.81

Finding the Fourth Proportional to 2,130.32, 2,938.32 and 1,421.81

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Solution

The fourth proportional to 2,130.32, 2,938.32 and 1,421.81 is: 1,961.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.32 : 2,938.32 = 1,421.81 : x
  2. Step 2: Convert to fraction form
    2,130.32/2,938.32 = 1,421.81/x
  3. Step 3: Cross multiply
    2,130.32x = 2,938.32 × 1,421.81
  4. Step 4: Simplify right side
    2,130.32x = 4,177,718.07
  5. Step 5: Solve for x
    x = 4,177,718.07/2,130.32
  6. Step 6: Final answer
    x = 1,961.08

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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.