Home / 15,495.48-21,384.09-8,421.84

Finding the Fourth Proportional to 15,495.48, 21,384.09 and 8,421.84

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Solution

The fourth proportional to 15,495.48, 21,384.09 and 8,421.84 is: 11,622.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.48 : 21,384.09 = 8,421.84 : x
  2. Step 2: Convert to fraction form
    15,495.48/21,384.09 = 8,421.84/x
  3. Step 3: Cross multiply
    15,495.48x = 21,384.09 × 8,421.84
  4. Step 4: Simplify right side
    15,495.48x = 180,093,384.53
  5. Step 5: Solve for x
    x = 180,093,384.53/15,495.48
  6. Step 6: Final answer
    x = 11,622.32

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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.