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Finding the Fourth Proportional to 12,984,477.40, 19,476,716.10 and 12,488,465.80

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Solution

The fourth proportional to 12,984,477.40, 19,476,716.10 and 12,488,465.80 is: 18,732,698.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,984,477.40 : 19,476,716.10 = 12,488,465.80 : x
  2. Step 2: Convert to fraction form
    12,984,477.40/19,476,716.10 = 12,488,465.80/x
  3. Step 3: Cross multiply
    12,984,477.40x = 19,476,716.10 × 12,488,465.80
  4. Step 4: Simplify right side
    12,984,477.40x = 243,234,302,911,159.41
  5. Step 5: Solve for x
    x = 243,234,302,911,159.41/12,984,477.40
  6. Step 6: Final answer
    x = 18,732,698.70

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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.