Home / 2,145.90-2,959.09-1,587.53

Finding the Fourth Proportional to 2,145.90, 2,959.09 and 1,587.53

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Solution

The fourth proportional to 2,145.90, 2,959.09 and 1,587.53 is: 2,189.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.90 : 2,959.09 = 1,587.53 : x
  2. Step 2: Convert to fraction form
    2,145.90/2,959.09 = 1,587.53/x
  3. Step 3: Cross multiply
    2,145.90x = 2,959.09 × 1,587.53
  4. Step 4: Simplify right side
    2,145.90x = 4,697,647.58
  5. Step 5: Solve for x
    x = 4,697,647.58/2,145.90
  6. Step 6: Final answer
    x = 2,189.12

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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.