Home / 21,240.72-29,312.64-13,970.16

Finding the Fourth Proportional to 21,240.72, 29,312.64 and 13,970.16

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Solution

The fourth proportional to 21,240.72, 29,312.64 and 13,970.16 is: 19,279.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.72 : 29,312.64 = 13,970.16 : x
  2. Step 2: Convert to fraction form
    21,240.72/29,312.64 = 13,970.16/x
  3. Step 3: Cross multiply
    21,240.72x = 29,312.64 × 13,970.16
  4. Step 4: Simplify right side
    21,240.72x = 409,502,270.82
  5. Step 5: Solve for x
    x = 409,502,270.82/21,240.72
  6. Step 6: Final answer
    x = 19,279.11

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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.