Home / 14,319.57-21,470.72-6,420.65

Finding the Fourth Proportional to 14,319.57, 21,470.72 and 6,420.65

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Solution

The fourth proportional to 14,319.57, 21,470.72 and 6,420.65 is: 9,627.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,319.57 : 21,470.72 = 6,420.65 : x
  2. Step 2: Convert to fraction form
    14,319.57/21,470.72 = 6,420.65/x
  3. Step 3: Cross multiply
    14,319.57x = 21,470.72 × 6,420.65
  4. Step 4: Simplify right side
    14,319.57x = 137,855,978.37
  5. Step 5: Solve for x
    x = 137,855,978.37/14,319.57
  6. Step 6: Final answer
    x = 9,627.10

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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.