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Finding the Fourth Proportional to 13,608,903.60, 20,413,355.40 and 12,223,220.40

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Solution

The fourth proportional to 13,608,903.60, 20,413,355.40 and 12,223,220.40 is: 18,334,830.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608,903.60 : 20,413,355.40 = 12,223,220.40 : x
  2. Step 2: Convert to fraction form
    13,608,903.60/20,413,355.40 = 12,223,220.40/x
  3. Step 3: Cross multiply
    13,608,903.60x = 20,413,355.40 × 12,223,220.40
  4. Step 4: Simplify right side
    13,608,903.60x = 249,516,942,157,730.16
  5. Step 5: Solve for x
    x = 249,516,942,157,730.16/13,608,903.60
  6. Step 6: Final answer
    x = 18,334,830.60

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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.