Home / 13,518,745.16-18,656,615.40-7,719,389.78

Finding the Fourth Proportional to 13,518,745.16, 18,656,615.40 and 7,719,389.78

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Solution

The fourth proportional to 13,518,745.16, 18,656,615.40 and 7,719,389.78 is: 10,653,184.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518,745.16 : 18,656,615.40 = 7,719,389.78 : x
  2. Step 2: Convert to fraction form
    13,518,745.16/18,656,615.40 = 7,719,389.78/x
  3. Step 3: Cross multiply
    13,518,745.16x = 18,656,615.40 × 7,719,389.78
  4. Step 4: Simplify right side
    13,518,745.16x = 144,017,686,248,150.59
  5. Step 5: Solve for x
    x = 144,017,686,248,150.59/13,518,745.16
  6. Step 6: Final answer
    x = 10,653,184.49

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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.