Home / 15,317.76-21,139.32-9,347.68

Finding the Fourth Proportional to 15,317.76, 21,139.32 and 9,347.68

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Solution

The fourth proportional to 15,317.76, 21,139.32 and 9,347.68 is: 12,900.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,317.76 : 21,139.32 = 9,347.68 : x
  2. Step 2: Convert to fraction form
    15,317.76/21,139.32 = 9,347.68/x
  3. Step 3: Cross multiply
    15,317.76x = 21,139.32 × 9,347.68
  4. Step 4: Simplify right side
    15,317.76x = 197,603,598.78
  5. Step 5: Solve for x
    x = 197,603,598.78/15,317.76
  6. Step 6: Final answer
    x = 12,900.29

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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.