Home / 20,298,130.80-28,009,688.40-11,477,149.80

Finding the Fourth Proportional to 20,298,130.80, 28,009,688.40 and 11,477,149.80

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Solution

The fourth proportional to 20,298,130.80, 28,009,688.40 and 11,477,149.80 is: 15,837,487.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,298,130.80 : 28,009,688.40 = 11,477,149.80 : x
  2. Step 2: Convert to fraction form
    20,298,130.80/28,009,688.40 = 11,477,149.80/x
  3. Step 3: Cross multiply
    20,298,130.80x = 28,009,688.40 × 11,477,149.80
  4. Step 4: Simplify right side
    20,298,130.80x = 321,471,389,618,122.31
  5. Step 5: Solve for x
    x = 321,471,389,618,122.31/20,298,130.80
  6. Step 6: Final answer
    x = 15,837,487.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.