Home / 21,326.51-31,989.77-10,931.63

Finding the Fourth Proportional to 21,326.51, 31,989.77 and 10,931.63

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Solution

The fourth proportional to 21,326.51, 31,989.77 and 10,931.63 is: 16,397.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,326.51 : 31,989.77 = 10,931.63 : x
  2. Step 2: Convert to fraction form
    21,326.51/31,989.77 = 10,931.63/x
  3. Step 3: Cross multiply
    21,326.51x = 31,989.77 × 10,931.63
  4. Step 4: Simplify right side
    21,326.51x = 349,700,329.43
  5. Step 5: Solve for x
    x = 349,700,329.43/21,326.51
  6. Step 6: Final answer
    x = 16,397.45

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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.