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Finding the Fourth Proportional to 12,936,009.20, 19,404,013.80 and 4,415,068.40

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Solution

The fourth proportional to 12,936,009.20, 19,404,013.80 and 4,415,068.40 is: 6,622,602.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,936,009.20 : 19,404,013.80 = 4,415,068.40 : x
  2. Step 2: Convert to fraction form
    12,936,009.20/19,404,013.80 = 4,415,068.40/x
  3. Step 3: Cross multiply
    12,936,009.20x = 19,404,013.80 × 4,415,068.40
  4. Step 4: Simplify right side
    12,936,009.20x = 85,670,048,161,543.94
  5. Step 5: Solve for x
    x = 85,670,048,161,543.94/12,936,009.20
  6. Step 6: Final answer
    x = 6,622,602.60

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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.