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Finding the Fourth Proportional to 9,368.80, 14,038.80 and 8,130.40

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Solution

The fourth proportional to 9,368.80, 14,038.80 and 8,130.40 is: 12,183.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,368.80 : 14,038.80 = 8,130.40 : x
  2. Step 2: Convert to fraction form
    9,368.80/14,038.80 = 8,130.40/x
  3. Step 3: Cross multiply
    9,368.80x = 14,038.80 × 8,130.40
  4. Step 4: Simplify right side
    9,368.80x = 114,141,059.52
  5. Step 5: Solve for x
    x = 114,141,059.52/9,368.80
  6. Step 6: Final answer
    x = 12,183.10

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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.