Home / 15,455.47-21,328.40-8,742.41

Finding the Fourth Proportional to 15,455.47, 21,328.40 and 8,742.41

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Solution

The fourth proportional to 15,455.47, 21,328.40 and 8,742.41 is: 12,064.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.47 : 21,328.40 = 8,742.41 : x
  2. Step 2: Convert to fraction form
    15,455.47/21,328.40 = 8,742.41/x
  3. Step 3: Cross multiply
    15,455.47x = 21,328.40 × 8,742.41
  4. Step 4: Simplify right side
    15,455.47x = 186,461,488.95
  5. Step 5: Solve for x
    x = 186,461,488.95/15,455.47
  6. Step 6: Final answer
    x = 12,064.44

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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.