Home / 20,736,009.60-31,104,014.40-13,140,412.80

Finding the Fourth Proportional to 20,736,009.60, 31,104,014.40 and 13,140,412.80

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Solution

The fourth proportional to 20,736,009.60, 31,104,014.40 and 13,140,412.80 is: 19,710,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736,009.60 : 31,104,014.40 = 13,140,412.80 : x
  2. Step 2: Convert to fraction form
    20,736,009.60/31,104,014.40 = 13,140,412.80/x
  3. Step 3: Cross multiply
    20,736,009.60x = 31,104,014.40 × 13,140,412.80
  4. Step 4: Simplify right side
    20,736,009.60x = 408,719,588,953,144.31
  5. Step 5: Solve for x
    x = 408,719,588,953,144.31/20,736,009.60
  6. Step 6: Final answer
    x = 19,710,619.20

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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.