Home / 18,720,963.60-28,081,445.40-9,142,486.80

Finding the Fourth Proportional to 18,720,963.60, 28,081,445.40 and 9,142,486.80

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Solution

The fourth proportional to 18,720,963.60, 28,081,445.40 and 9,142,486.80 is: 13,713,730.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720,963.60 : 28,081,445.40 = 9,142,486.80 : x
  2. Step 2: Convert to fraction form
    18,720,963.60/28,081,445.40 = 9,142,486.80/x
  3. Step 3: Cross multiply
    18,720,963.60x = 28,081,445.40 × 9,142,486.80
  4. Step 4: Simplify right side
    18,720,963.60x = 256,734,243,894,420.72
  5. Step 5: Solve for x
    x = 256,734,243,894,420.72/18,720,963.60
  6. Step 6: Final answer
    x = 13,713,730.20

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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.