Home / 25,918.08-35,772-15,307.20

Finding the Fourth Proportional to 25,918.08, 35,772 and 15,307.20

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Solution

The fourth proportional to 25,918.08, 35,772 and 15,307.20 is: 21,126.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,918.08 : 35,772 = 15,307.20 : x
  2. Step 2: Convert to fraction form
    25,918.08/35,772 = 15,307.20/x
  3. Step 3: Cross multiply
    25,918.08x = 35,772 × 15,307.20
  4. Step 4: Simplify right side
    25,918.08x = 547,569,158.40
  5. Step 5: Solve for x
    x = 547,569,158.40/25,918.08
  6. Step 6: Final answer
    x = 21,126.92

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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.