Home / 13,291,710.72-18,343,640-7,490,885.20

Finding the Fourth Proportional to 13,291,710.72, 18,343,640 and 7,490,885.20

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Solution

The fourth proportional to 13,291,710.72, 18,343,640 and 7,490,885.20 is: 10,338,029.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291,710.72 : 18,343,640 = 7,490,885.20 : x
  2. Step 2: Convert to fraction form
    13,291,710.72/18,343,640 = 7,490,885.20/x
  3. Step 3: Cross multiply
    13,291,710.72x = 18,343,640 × 7,490,885.20
  4. Step 4: Simplify right side
    13,291,710.72x = 137,410,101,390,128
  5. Step 5: Solve for x
    x = 137,410,101,390,128/13,291,710.72
  6. Step 6: Final answer
    x = 10,338,029.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.