Home / 39,985.51-55,413.43-39,421.75

Finding the Fourth Proportional to 39,985.51, 55,413.43 and 39,421.75

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Solution

The fourth proportional to 39,985.51, 55,413.43 and 39,421.75 is: 54,632.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,985.51 : 55,413.43 = 39,421.75 : x
  2. Step 2: Convert to fraction form
    39,985.51/55,413.43 = 39,421.75/x
  3. Step 3: Cross multiply
    39,985.51x = 55,413.43 × 39,421.75
  4. Step 4: Simplify right side
    39,985.51x = 2,184,494,384.10
  5. Step 5: Solve for x
    x = 2,184,494,384.10/39,985.51
  6. Step 6: Final answer
    x = 54,632.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.