Home / 2,891.04-3,989.63-1,564.74

Finding the Fourth Proportional to 2,891.04, 3,989.63 and 1,564.74

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Solution

The fourth proportional to 2,891.04, 3,989.63 and 1,564.74 is: 2,159.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.04 : 3,989.63 = 1,564.74 : x
  2. Step 2: Convert to fraction form
    2,891.04/3,989.63 = 1,564.74/x
  3. Step 3: Cross multiply
    2,891.04x = 3,989.63 × 1,564.74
  4. Step 4: Simplify right side
    2,891.04x = 6,242,725.82
  5. Step 5: Solve for x
    x = 6,242,725.82/2,891.04
  6. Step 6: Final answer
    x = 2,159.34

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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.