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Finding the Fourth Proportional to 9,980.15, 14,970.36 and 4,784.81

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Solution

The fourth proportional to 9,980.15, 14,970.36 and 4,784.81 is: 7,177.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,980.15 : 14,970.36 = 4,784.81 : x
  2. Step 2: Convert to fraction form
    9,980.15/14,970.36 = 4,784.81/x
  3. Step 3: Cross multiply
    9,980.15x = 14,970.36 × 4,784.81
  4. Step 4: Simplify right side
    9,980.15x = 71,630,253.38
  5. Step 5: Solve for x
    x = 71,630,253.38/9,980.15
  6. Step 6: Final answer
    x = 7,177.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.