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Finding the Fourth Proportional to 12,751,987.60, 19,127,981.40 and 5,184,384.40

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Solution

The fourth proportional to 12,751,987.60, 19,127,981.40 and 5,184,384.40 is: 7,776,576.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,751,987.60 : 19,127,981.40 = 5,184,384.40 : x
  2. Step 2: Convert to fraction form
    12,751,987.60/19,127,981.40 = 5,184,384.40/x
  3. Step 3: Cross multiply
    12,751,987.60x = 19,127,981.40 × 5,184,384.40
  4. Step 4: Simplify right side
    12,751,987.60x = 99,166,808,373,650.16
  5. Step 5: Solve for x
    x = 99,166,808,373,650.16/12,751,987.60
  6. Step 6: Final answer
    x = 7,776,576.60

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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.