Finding the Fourth Proportional to 21,312,790.47, 29,413,930.14 and 13,058,330.76
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Solution
The fourth proportional to 21,312,790.47, 29,413,930.14 and 13,058,330.76 is: 18,021,892.97
Step by Step Solution
- Step 1: Write the proportion equation
21,312,790.47 : 29,413,930.14 = 13,058,330.76 : x - Step 2: Convert to fraction form
21,312,790.47/29,413,930.14 = 13,058,330.76/x - Step 3: Cross multiply
21,312,790.47x = 29,413,930.14 × 13,058,330.76 - Step 4: Simplify right side
21,312,790.47x = 384,096,828,719,653.12 - Step 5: Solve for x
x = 384,096,828,719,653.12/21,312,790.47 - Step 6: Final answer
x = 18,021,892.97
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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.