Home / 21,004,081.60-31,443,136.80-12,480,030.40

Finding the Fourth Proportional to 21,004,081.60, 31,443,136.80 and 12,480,030.40

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Solution

The fourth proportional to 21,004,081.60, 31,443,136.80 and 12,480,030.40 is: 18,682,621.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004,081.60 : 31,443,136.80 = 12,480,030.40 : x
  2. Step 2: Convert to fraction form
    21,004,081.60/31,443,136.80 = 12,480,030.40/x
  3. Step 3: Cross multiply
    21,004,081.60x = 31,443,136.80 × 12,480,030.40
  4. Step 4: Simplify right side
    21,004,081.60x = 392,411,303,135,358.75
  5. Step 5: Solve for x
    x = 392,411,303,135,358.75/21,004,081.60
  6. Step 6: Final answer
    x = 18,682,621.34

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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.