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Finding the Fourth Proportional to 9,888.48, 13,645.44 and 5,695.20

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Solution

The fourth proportional to 9,888.48, 13,645.44 and 5,695.20 is: 7,858.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,888.48 : 13,645.44 = 5,695.20 : x
  2. Step 2: Convert to fraction form
    9,888.48/13,645.44 = 5,695.20/x
  3. Step 3: Cross multiply
    9,888.48x = 13,645.44 × 5,695.20
  4. Step 4: Simplify right side
    9,888.48x = 77,713,509.89
  5. Step 5: Solve for x
    x = 77,713,509.89/9,888.48
  6. Step 6: Final answer
    x = 7,858.99

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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.