Home / 39,880.95-55,038.14-21,975.93

Finding the Fourth Proportional to 39,880.95, 55,038.14 and 21,975.93

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Solution

The fourth proportional to 39,880.95, 55,038.14 and 21,975.93 is: 30,328.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,880.95 : 55,038.14 = 21,975.93 : x
  2. Step 2: Convert to fraction form
    39,880.95/55,038.14 = 21,975.93/x
  3. Step 3: Cross multiply
    39,880.95x = 55,038.14 × 21,975.93
  4. Step 4: Simplify right side
    39,880.95x = 1,209,514,202.09
  5. Step 5: Solve for x
    x = 1,209,514,202.09/39,880.95
  6. Step 6: Final answer
    x = 30,328.12

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1.5x scale

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.