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Finding the Fourth Proportional to 18,909,784.80, 28,322,686.80 and 16,390,360.80

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Solution

The fourth proportional to 18,909,784.80, 28,322,686.80 and 16,390,360.80 is: 24,549,145.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909,784.80 : 28,322,686.80 = 16,390,360.80 : x
  2. Step 2: Convert to fraction form
    18,909,784.80/28,322,686.80 = 16,390,360.80/x
  3. Step 3: Cross multiply
    18,909,784.80x = 28,322,686.80 × 16,390,360.80
  4. Step 4: Simplify right side
    18,909,784.80x = 464,219,055,477,397.50
  5. Step 5: Solve for x
    x = 464,219,055,477,397.50/18,909,784.80
  6. Step 6: Final answer
    x = 24,549,145.34

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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.