Home / 14,389.55-19,857.96-8,421.32

Finding the Fourth Proportional to 14,389.55, 19,857.96 and 8,421.32

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Solution

The fourth proportional to 14,389.55, 19,857.96 and 8,421.32 is: 11,621.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,389.55 : 19,857.96 = 8,421.32 : x
  2. Step 2: Convert to fraction form
    14,389.55/19,857.96 = 8,421.32/x
  3. Step 3: Cross multiply
    14,389.55x = 19,857.96 × 8,421.32
  4. Step 4: Simplify right side
    14,389.55x = 167,230,173.65
  5. Step 5: Solve for x
    x = 167,230,173.65/14,389.55
  6. Step 6: Final answer
    x = 11,621.64

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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.