Home / 14,389.63-19,859.11-8,420.94

Finding the Fourth Proportional to 14,389.63, 19,859.11 and 8,420.94

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Solution

The fourth proportional to 14,389.63, 19,859.11 and 8,420.94 is: 11,621.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,389.63 : 19,859.11 = 8,420.94 : x
  2. Step 2: Convert to fraction form
    14,389.63/19,859.11 = 8,420.94/x
  3. Step 3: Cross multiply
    14,389.63x = 19,859.11 × 8,420.94
  4. Step 4: Simplify right side
    14,389.63x = 167,232,352.71
  5. Step 5: Solve for x
    x = 167,232,352.71/14,389.63
  6. Step 6: Final answer
    x = 11,621.73

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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.