Home / 14,389.88-19,859.45-8,421.19

Finding the Fourth Proportional to 14,389.88, 19,859.45 and 8,421.19

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Solution

The fourth proportional to 14,389.88, 19,859.45 and 8,421.19 is: 11,622.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,389.88 : 19,859.45 = 8,421.19 : x
  2. Step 2: Convert to fraction form
    14,389.88/19,859.45 = 8,421.19/x
  3. Step 3: Cross multiply
    14,389.88x = 19,859.45 × 8,421.19
  4. Step 4: Simplify right side
    14,389.88x = 167,240,222.80
  5. Step 5: Solve for x
    x = 167,240,222.80/14,389.88
  6. Step 6: Final answer
    x = 11,622.07

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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.