Home / 21,276,081.60-31,893,386.40-12,168,830.40

Finding the Fourth Proportional to 21,276,081.60, 31,893,386.40 and 12,168,830.40

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Solution

The fourth proportional to 21,276,081.60, 31,893,386.40 and 12,168,830.40 is: 18,241,385.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276,081.60 : 31,893,386.40 = 12,168,830.40 : x
  2. Step 2: Convert to fraction form
    21,276,081.60/31,893,386.40 = 12,168,830.40/x
  3. Step 3: Cross multiply
    21,276,081.60x = 31,893,386.40 × 12,168,830.40
  4. Step 4: Simplify right side
    21,276,081.60x = 388,105,209,983,266.56
  5. Step 5: Solve for x
    x = 388,105,209,983,266.56/21,276,081.60
  6. Step 6: Final answer
    x = 18,241,385.67

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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.