Home / 20,690.15-31,038.65-8,210.26

Finding the Fourth Proportional to 20,690.15, 31,038.65 and 8,210.26

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Solution

The fourth proportional to 20,690.15, 31,038.65 and 8,210.26 is: 12,316.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.15 : 31,038.65 = 8,210.26 : x
  2. Step 2: Convert to fraction form
    20,690.15/31,038.65 = 8,210.26/x
  3. Step 3: Cross multiply
    20,690.15x = 31,038.65 × 8,210.26
  4. Step 4: Simplify right side
    20,690.15x = 254,835,386.55
  5. Step 5: Solve for x
    x = 254,835,386.55/20,690.15
  6. Step 6: Final answer
    x = 12,316.75

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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.