Home / 15,780.38-21,777.63-9,068.18

Finding the Fourth Proportional to 15,780.38, 21,777.63 and 9,068.18

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Solution

The fourth proportional to 15,780.38, 21,777.63 and 9,068.18 is: 12,514.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.38 : 21,777.63 = 9,068.18 : x
  2. Step 2: Convert to fraction form
    15,780.38/21,777.63 = 9,068.18/x
  3. Step 3: Cross multiply
    15,780.38x = 21,777.63 × 9,068.18
  4. Step 4: Simplify right side
    15,780.38x = 197,483,468.81
  5. Step 5: Solve for x
    x = 197,483,468.81/15,780.38
  6. Step 6: Final answer
    x = 12,514.49

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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.