Home / 28,756.43-39,681.08-21,206.82

Finding the Fourth Proportional to 28,756.43, 39,681.08 and 21,206.82

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Solution

The fourth proportional to 28,756.43, 39,681.08 and 21,206.82 is: 29,263.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,756.43 : 39,681.08 = 21,206.82 : x
  2. Step 2: Convert to fraction form
    28,756.43/39,681.08 = 21,206.82/x
  3. Step 3: Cross multiply
    28,756.43x = 39,681.08 × 21,206.82
  4. Step 4: Simplify right side
    28,756.43x = 841,509,643.26
  5. Step 5: Solve for x
    x = 841,509,643.26/28,756.43
  6. Step 6: Final answer
    x = 29,263.36

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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.