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Finding the Fourth Proportional to 9,866.16, 13,615.08 and 5,389.93

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Solution

The fourth proportional to 9,866.16, 13,615.08 and 5,389.93 is: 7,437.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,866.16 : 13,615.08 = 5,389.93 : x
  2. Step 2: Convert to fraction form
    9,866.16/13,615.08 = 5,389.93/x
  3. Step 3: Cross multiply
    9,866.16x = 13,615.08 × 5,389.93
  4. Step 4: Simplify right side
    9,866.16x = 73,384,328.14
  5. Step 5: Solve for x
    x = 73,384,328.14/9,866.16
  6. Step 6: Final answer
    x = 7,437.98

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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.