Home / 52,130.40-78,176.16-20,955.12

Finding the Fourth Proportional to 52,130.40, 78,176.16 and 20,955.12

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Solution

The fourth proportional to 52,130.40, 78,176.16 and 20,955.12 is: 31,424.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,130.40 : 78,176.16 = 20,955.12 : x
  2. Step 2: Convert to fraction form
    52,130.40/78,176.16 = 20,955.12/x
  3. Step 3: Cross multiply
    52,130.40x = 78,176.16 × 20,955.12
  4. Step 4: Simplify right side
    52,130.40x = 1,638,190,813.94
  5. Step 5: Solve for x
    x = 1,638,190,813.94/52,130.40
  6. Step 6: Final answer
    x = 31,424.87

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1.5x scale

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.