Home / 15,931.08-21,985.02-9,639

Finding the Fourth Proportional to 15,931.08, 21,985.02 and 9,639

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Solution

The fourth proportional to 15,931.08, 21,985.02 and 9,639 is: 13,301.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,931.08 : 21,985.02 = 9,639 : x
  2. Step 2: Convert to fraction form
    15,931.08/21,985.02 = 9,639/x
  3. Step 3: Cross multiply
    15,931.08x = 21,985.02 × 9,639
  4. Step 4: Simplify right side
    15,931.08x = 211,913,607.78
  5. Step 5: Solve for x
    x = 211,913,607.78/15,931.08
  6. Step 6: Final answer
    x = 13,301.90

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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.