Home / 5,386.20-8,079.30-1,688.10

Finding the Fourth Proportional to 5,386.20, 8,079.30 and 1,688.10

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Solution

The fourth proportional to 5,386.20, 8,079.30 and 1,688.10 is: 2,532.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,386.20 : 8,079.30 = 1,688.10 : x
  2. Step 2: Convert to fraction form
    5,386.20/8,079.30 = 1,688.10/x
  3. Step 3: Cross multiply
    5,386.20x = 8,079.30 × 1,688.10
  4. Step 4: Simplify right side
    5,386.20x = 13,638,666.33
  5. Step 5: Solve for x
    x = 13,638,666.33/5,386.20
  6. Step 6: Final answer
    x = 2,532.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.