Home / 10,389.90-15,518.56-9,401.20

Finding the Fourth Proportional to 10,389.90, 15,518.56 and 9,401.20

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Solution

The fourth proportional to 10,389.90, 15,518.56 and 9,401.20 is: 14,041.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,389.90 : 15,518.56 = 9,401.20 : x
  2. Step 2: Convert to fraction form
    10,389.90/15,518.56 = 9,401.20/x
  3. Step 3: Cross multiply
    10,389.90x = 15,518.56 × 9,401.20
  4. Step 4: Simplify right side
    10,389.90x = 145,893,015.16
  5. Step 5: Solve for x
    x = 145,893,015.16/10,389.90
  6. Step 6: Final answer
    x = 14,041.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.