Home / 21,312,043.20-31,968,064.80-12,214,123.20

Finding the Fourth Proportional to 21,312,043.20, 31,968,064.80 and 12,214,123.20

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Solution

The fourth proportional to 21,312,043.20, 31,968,064.80 and 12,214,123.20 is: 18,321,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312,043.20 : 31,968,064.80 = 12,214,123.20 : x
  2. Step 2: Convert to fraction form
    21,312,043.20/31,968,064.80 = 12,214,123.20/x
  3. Step 3: Cross multiply
    21,312,043.20x = 31,968,064.80 × 12,214,123.20
  4. Step 4: Simplify right side
    21,312,043.20x = 390,461,881,932,783.38
  5. Step 5: Solve for x
    x = 390,461,881,932,783.38/21,312,043.20
  6. Step 6: Final answer
    x = 18,321,184.80

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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.