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Finding the Fourth Proportional to 9,781,911.60, 14,675,491.80 and 8,724,278.40

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Solution

The fourth proportional to 9,781,911.60, 14,675,491.80 and 8,724,278.40 is: 13,088,758.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,781,911.60 : 14,675,491.80 = 8,724,278.40 : x
  2. Step 2: Convert to fraction form
    9,781,911.60/14,675,491.80 = 8,724,278.40/x
  3. Step 3: Cross multiply
    9,781,911.60x = 14,675,491.80 × 8,724,278.40
  4. Step 4: Simplify right side
    9,781,911.60x = 128,033,076,120,117.12
  5. Step 5: Solve for x
    x = 128,033,076,120,117.12/9,781,911.60
  6. Step 6: Final answer
    x = 13,088,758.25

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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.