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Finding the Fourth Proportional to 12,607,913.60, 18,911,870.40 and 12,607,913.60

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Solution

The fourth proportional to 12,607,913.60, 18,911,870.40 and 12,607,913.60 is: 18,911,870.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,607,913.60 : 18,911,870.40 = 12,607,913.60 : x
  2. Step 2: Convert to fraction form
    12,607,913.60/18,911,870.40 = 12,607,913.60/x
  3. Step 3: Cross multiply
    12,607,913.60x = 18,911,870.40 × 12,607,913.60
  4. Step 4: Simplify right side
    12,607,913.60x = 238,439,228,017,597.41
  5. Step 5: Solve for x
    x = 238,439,228,017,597.41/12,607,913.60
  6. Step 6: Final answer
    x = 18,911,870.40

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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.