Home / 15,389.86-21,243.27-9,018.49

Finding the Fourth Proportional to 15,389.86, 21,243.27 and 9,018.49

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Solution

The fourth proportional to 15,389.86, 21,243.27 and 9,018.49 is: 12,448.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.86 : 21,243.27 = 9,018.49 : x
  2. Step 2: Convert to fraction form
    15,389.86/21,243.27 = 9,018.49/x
  3. Step 3: Cross multiply
    15,389.86x = 21,243.27 × 9,018.49
  4. Step 4: Simplify right side
    15,389.86x = 191,582,218.06
  5. Step 5: Solve for x
    x = 191,582,218.06/15,389.86
  6. Step 6: Final answer
    x = 12,448.60

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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.