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Finding the Fourth Proportional to 9,988,752.80, 14,961,010.80 and 8,219,280.80

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Solution

The fourth proportional to 9,988,752.80, 14,961,010.80 and 8,219,280.80 is: 12,310,721.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988,752.80 : 14,961,010.80 = 8,219,280.80 : x
  2. Step 2: Convert to fraction form
    9,988,752.80/14,961,010.80 = 8,219,280.80/x
  3. Step 3: Cross multiply
    9,988,752.80x = 14,961,010.80 × 8,219,280.80
  4. Step 4: Simplify right side
    9,988,752.80x = 122,968,748,817,032.64
  5. Step 5: Solve for x
    x = 122,968,748,817,032.64/9,988,752.80
  6. Step 6: Final answer
    x = 12,310,721.00

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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.