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Finding the Fourth Proportional to 12,973,632.80, 19,465,978.80 and 8,184,999.20

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Solution

The fourth proportional to 12,973,632.80, 19,465,978.80 and 8,184,999.20 is: 12,280,987.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,973,632.80 : 19,465,978.80 = 8,184,999.20 : x
  2. Step 2: Convert to fraction form
    12,973,632.80/19,465,978.80 = 8,184,999.20/x
  3. Step 3: Cross multiply
    12,973,632.80x = 19,465,978.80 × 8,184,999.20
  4. Step 4: Simplify right side
    12,973,632.80x = 159,329,020,905,216.97
  5. Step 5: Solve for x
    x = 159,329,020,905,216.97/12,973,632.80
  6. Step 6: Final answer
    x = 12,280,987.40

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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.