Home / 9,621.90-13,278.18-5,430.15

Finding the Fourth Proportional to 9,621.90, 13,278.18 and 5,430.15

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Solution

The fourth proportional to 9,621.90, 13,278.18 and 5,430.15 is: 7,493.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,621.90 : 13,278.18 = 5,430.15 : x
  2. Step 2: Convert to fraction form
    9,621.90/13,278.18 = 5,430.15/x
  3. Step 3: Cross multiply
    9,621.90x = 13,278.18 × 5,430.15
  4. Step 4: Simplify right side
    9,621.90x = 72,102,509.13
  5. Step 5: Solve for x
    x = 72,102,509.13/9,621.90
  6. Step 6: Final answer
    x = 7,493.58

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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.