Home / 12,138,123.79-18,209,810.10-6,457,522.51

Finding the Fourth Proportional to 12,138,123.79, 18,209,810.10 and 6,457,522.51

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Solution

The fourth proportional to 12,138,123.79, 18,209,810.10 and 6,457,522.51 is: 9,687,679.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138,123.79 : 18,209,810.10 = 6,457,522.51 : x
  2. Step 2: Convert to fraction form
    12,138,123.79/18,209,810.10 = 6,457,522.51/x
  3. Step 3: Cross multiply
    12,138,123.79x = 18,209,810.10 × 6,457,522.51
  4. Step 4: Simplify right side
    12,138,123.79x = 117,590,258,623,575.36
  5. Step 5: Solve for x
    x = 117,590,258,623,575.36/12,138,123.79
  6. Step 6: Final answer
    x = 9,687,679.96

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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.