Home / 19,931.24-27,506.36-10,978.74

Finding the Fourth Proportional to 19,931.24, 27,506.36 and 10,978.74

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Solution

The fourth proportional to 19,931.24, 27,506.36 and 10,978.74 is: 15,151.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.24 : 27,506.36 = 10,978.74 : x
  2. Step 2: Convert to fraction form
    19,931.24/27,506.36 = 10,978.74/x
  3. Step 3: Cross multiply
    19,931.24x = 27,506.36 × 10,978.74
  4. Step 4: Simplify right side
    19,931.24x = 301,985,119.89
  5. Step 5: Solve for x
    x = 301,985,119.89/19,931.24
  6. Step 6: Final answer
    x = 15,151.35

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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.