Home / 2,547.21-3,515.10-1,428.18

Finding the Fourth Proportional to 2,547.21, 3,515.10 and 1,428.18

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Solution

The fourth proportional to 2,547.21, 3,515.10 and 1,428.18 is: 1,970.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,547.21 : 3,515.10 = 1,428.18 : x
  2. Step 2: Convert to fraction form
    2,547.21/3,515.10 = 1,428.18/x
  3. Step 3: Cross multiply
    2,547.21x = 3,515.10 × 1,428.18
  4. Step 4: Simplify right side
    2,547.21x = 5,020,195.52
  5. Step 5: Solve for x
    x = 5,020,195.52/2,547.21
  6. Step 6: Final answer
    x = 1,970.86

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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.