Home / 2,128.98-2,937.65-1,332.21

Finding the Fourth Proportional to 2,128.98, 2,937.65 and 1,332.21

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Solution

The fourth proportional to 2,128.98, 2,937.65 and 1,332.21 is: 1,838.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.98 : 2,937.65 = 1,332.21 : x
  2. Step 2: Convert to fraction form
    2,128.98/2,937.65 = 1,332.21/x
  3. Step 3: Cross multiply
    2,128.98x = 2,937.65 × 1,332.21
  4. Step 4: Simplify right side
    2,128.98x = 3,913,577.38
  5. Step 5: Solve for x
    x = 3,913,577.38/2,128.98
  6. Step 6: Final answer
    x = 1,838.24

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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.