Home / 13,921.65-20,888.69-6,421.18

Finding the Fourth Proportional to 13,921.65, 20,888.69 and 6,421.18

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Solution

The fourth proportional to 13,921.65, 20,888.69 and 6,421.18 is: 9,634.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.65 : 20,888.69 = 6,421.18 : x
  2. Step 2: Convert to fraction form
    13,921.65/20,888.69 = 6,421.18/x
  3. Step 3: Cross multiply
    13,921.65x = 20,888.69 × 6,421.18
  4. Step 4: Simplify right side
    13,921.65x = 134,130,038.45
  5. Step 5: Solve for x
    x = 134,130,038.45/13,921.65
  6. Step 6: Final answer
    x = 9,634.64

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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.