Home / 3,129.51-4,319.21-1,870.16

Finding the Fourth Proportional to 3,129.51, 4,319.21 and 1,870.16

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Solution

The fourth proportional to 3,129.51, 4,319.21 and 1,870.16 is: 2,581.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.51 : 4,319.21 = 1,870.16 : x
  2. Step 2: Convert to fraction form
    3,129.51/4,319.21 = 1,870.16/x
  3. Step 3: Cross multiply
    3,129.51x = 4,319.21 × 1,870.16
  4. Step 4: Simplify right side
    3,129.51x = 8,077,629.25
  5. Step 5: Solve for x
    x = 8,077,629.25/3,129.51
  6. Step 6: Final answer
    x = 2,581.12

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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.